Free 7zip software for windows

PeaZip is an archiver tool supporting its native Pea archive format which sports options like compression, split volumes, and flexible encryption and integrity check algorithms as well as other mainstream formats.
PeaZip allows to edit, save and restore archives layouts; apply powerful multiple filters to archives content; handle multiple archives at once; export job definition as command line; encrypt with AES256 etc.
PeaZips UI aims giving aid to the user to: edit, save and restore layout of archives (input files and folders list) to speed up definition of archiving and backup operations; save job definition, as plain text, to be used in scripts or for learning purpose; have a detailed job log after each operation.
The interface is fully skinnable (skins can be customised and saved as plain text to be re-edited as freely as possible) and uses customisable transparency.
Full support: 7Z, 7-Zip sfx, Bzip2, Gzip, PEA, split TAR and ZIP.
Browse/test/extract-only support for ARJ, CAB, CHM, CPIO, DEB, ISO, LZH, NSIS installers, OOo files, RAR, RPM, Z.
Main features:
- robust file copy
- split/join files (file span)
- secure file deletion
- file comparison
- checksum and hash files
- quick access to system tools
- system benchmark
- archive test
- generate random passwords and keyfiles

Enhancements:
- Added support for UDF, XAR, and DMG/HFS file types, improved support for OpenOffice file types - total 79 file extensions supported
- Content and filenames encryption status is now fully inherited by new objects when adding files/folders to 7z archives
- Custom file types can now be opened directly from "extract" menu entries
- Improved input file recognition for UPX compression (11 extensions)
- Updated 7z frontend to 4.60 (Windows)
- Updated Pea frontend to 0.21
- Updated W.E. crypto library with package aes_2008-08-04
- Added third area to status bar showing current filesystem, or archive type plus encryption status
- "Extract to new folder" flag is no longer limited to current session
- Open executables/files/folders (in Windows) are now lauched in a separate processes rather than through shellexecute method (unless necessary) in order to increase parallelism and avoid possible stalls while waiting slow resources
- Fixed configuration/bookmarks/rnd issues related to lack of write access for unprivileged users (Windows and Linux installable packages)
- Improved file/archive browsers keyboard shorcuts:
- Backspace mapped to browse previous path
- More functional keys are now supported
- F2 browse desktop / Ctrl+F2 home / Shift+F2 root
- F3 search (recoursive) / Shift+F3 search here (non recoursive)
- F4 up one level
- F6 toggle browse/flat view
- F7 browse most recently visited item / Ctrl+F7 second / Shift+F7 third
- F8 browse first item in bookmarks list / Ctrl+F8 second / Shift+F8 third
- F9 toggle extract in new folder status / Shift+F9 reset extraction path to default
- F11 extract selected to
- F12 extract selected here
- "Quick delete" and "Secure delete" bounded to del and shift+del respectively; shift+backspace remains for "Remove from layout" event in layout composer interface and is no longer used in file/archive manager
- New "Extract..." systems menu entry to allow specify path, extraction in new folder, password and other options
- On Extract here (and list/test functions) from systems menus, now PeaZip test if password is needed and if archive is not corrupted (for performance reasons only for archives smaller than 100MB)
- New localizations - Czech, German, Portuguese, Russian
- Toolbar buttons width extended to 110px to better fit text
- Added "revision" letter in programs numbering; revisions contains the same text and uses the same localization files with no need of out of order loading as different version does
- New function to display environment variables
- Fixed possible cases of "Access violation" message on exit occourring on some configurations

Zipeg for Windows 2.7.1.982 offers a free yet effective tool that opens and explores content of zip, rar, arj and other archives, preview files and images before you extract/unzip them. Extract only the files you want.
Using Zipeg you can double click on the item and automatically open the document in Preview or your preferred application before you extract it.
Major Features:

1. Supports wide variety of archive formats:ZIP, RAR, ARJ, LHA/LZH, 7z, TAR, GZ, TGZ, BZIP2, CPIO, RPM, ISO, CHM, Z, CBR, CBZ, WAR, EAR...
   
2. Allows to see what's inside archive BEFORE extracting files;
   
3. Opens files in Preview or any other associated application directly from the archive;
   
4. Displays image thumbnails (EXIF) in tooltips;
   
5. Extracts/unzips items simply by dragging them;
   
6. Easy-to-use user interface;
   
7. Resource fork, file permissions and Finder attributes support for Mac OSX;
   
8. Supports filenames in national alphabets in UTF-8, Unicode and codepage encodings;
   
9. Processes archives in background;
   
10. Does not have any archive size limitations;
    
11. Allows to explore CD and DVD ".iso" image files;
    
12. Reports cumulative contents size of subfolders;
    
13. Gives fine control over customizable destination of extraction;
    
14. Automatically opens nested archives;
    
15. Opens archives via file types associations;
    
16. Provides `path completion` for destination folders;
    
17. Sorts content of folders by name, size or date;
    
18. Automatically checks for latest updates;
    
19. Universal binaries for Apple Macintosh OS X;
    
20. Full Mac OSX and Windows XP/Vista support;
    
21. Build on top of powerful 7zip engine;
22. Decode filenames in your national alphabet;
    
23. Open files in Preview directly from the archive;
    
24. See image thumbnails (EXIF) in tooltips;
    
25. Archives are processed in background;
    
26. Opens password protected encrypted archives
    
27. Decodes national file name encodings inside archives (code pages)
    
28. Reports cumulative contents size of subfolders;
    
29. Customizable destination and source of extraction;
    
30. Settings are persisted between sessions;
    
31. Seamless keyboard navigation;
    

Cobian Backup is a multi-threaded program that can be used to schedule and backup your files and directories from their original location to other directories/drives in the same computer or other computer in your network. FTP backup is also supported.
Cobian Backup supports several methods of compression and strong encryption.
Cobian Backup exists in two different versions: application and service. The program uses very few resources and can be running on the background on your system, checking your backup schedule and executing your backups when necessary.
Cobian Backup is not an usual backup application: it only copies your files and folders in original or compressed mode to other destination, creating a security copy as a result. So Cobian Backup can be better described as a "Scheduler for security copies".
Main features:
- Zip64 for zip files larger than 2 GB
- Strong encryption: Supported methods are Blowfish (128 bit), Rijndael (128 bit) and DES (64 bit)
- An open plugin architecture to allow the programs enhancement
- 3 different methods to copy files, if the main method fails, 2 more methods will be used.
- The interprocess communication can be done using TCP/IP. This allows a better communication between the program parts AND the program can be administrated from another machine anywhere in the world.
- Backup to multiple destinations
- A backup history is displayed
- Zip files can now be split
- Remote backup
- Automatically remove old backups
- The application can be used as a command line utility. No separate command line program is needed

Enhancements:
- Support for Volume Shadow Copies. You will be able to backup locked files
- Support for 7zip compression
- Now you can pause the backup in any place
- The update function can now use SOCKS
- proxy SMTP can now use SOCKS
- SMTP can now use SSL
- Autostart the interface can now be set for all users or the current user
- Autostart options are now playing fair with administrator?s rights
- Start a backup when autostart
- The remote directories are now created from the top to the root, thus minimizing the risk for Permission problems
- Downloading files shows now the percent
- FTP operations can now use UTF transfers if the server support it
- FTP operations use now UNICODE for local operations
- Zip files can now store file names in UNICODE
- Checking an archive could sometimes delete the archived files. Fixed.
- Prettier about boxes
- Icon in task properties for Manual AND ftp where swapped
- IPC via MMF is now gone
- The update server can now use MSSQL for logs or can use no logs at all
- SQX is now gone.
- Checking archives wrongly displayed Compressing using the verbose log
- CobDeleter is now an integral part of the UI
- Fixed the old ?Error while connecting to :21:" error
- A brand new, improved help file and tutorial
- And MUCH more

System Requirements: Windows

Enhancements: 7zip ripper added , bugs fixed , new sign

avast! Virus Definitions 4.x VPS 090404-0 is a virus database updates, which are downloaded and installed automatically without any user action. when an Internet connection is established, and every four hours afterwards.

Update files can also be downloaded from these pages if required oif your computer does not have an Internet connection. Updates are usually released on a daily basis. No reinstallation of the program is needed for virus database updates!

avast! 4 is a collection of award winning, high-end technologies that work in perfect synergy, having one common goal: to protect your system and valuable data against computer viruses. avast! represents a best-in-class solution for any Windows-based computer. iAVS is a fast, small, incremental and fully automated update via the Internet. Updates are released at least twice a week.

Major Features:

1. Anti-spyware built-in
   • Spyware is software installed on a computer that is designed to collect information about the computer user, often without their knowledge or consent. This can result in so called identity theft, or theft of valuable information (e.g. bank or credit card details) or proprietary business data. Spyware is often developed by organized crime rings rather than lone individuals and may be installed by a virus.
   • Certified by West Coast Lab's Checkmark process, avast! has full anti-spyware capabilities built-in, to make your protection even more complete.
2. Anti-rootkit built-in
   • Rootkits are programs that install on your computer while keeping themselves and their activities hidden to remain invisible to the use. They represent a significant security risk on both home computers and company networks and are notoriously difficult to find and remove. Rootkits themselves are normally installed by a virus or other type of malware infection and it is therefore highly recommended that computer users have up to date antivirus/anti-spyware software installed and running on their computer. One such system is avast! antivirus.
   • Based on the class-leading GMER technology, avast! can now scan your live system for rootkit infections; no boots disks are required. If a rootkit is discovered, it is initially disabled and then if it can be safely removed without affecting the performance of the computer, it is removed. avast! antivirus includes a virus database which can be automatically updated to provide continuous protection against rootkits.
   • Strong self-protection
   • Some viruses may attempt to switch off a computer's antivirus software. To help keep your protection working, even against the latest threats that may try to disable your security protection, avast! has best-in-class strong self-protection built in, to make sure, no matter what you face, avast! carries on protecting your valuable data and programs. This is based on the multi-award winning avast! antivirus technology and provides an extra layer of security to ensure your data and programs are always protected.
3. Antivirus kernel avast! Checkmark certificate Virus Bulletin Award
   • The latest version of avast! antivirus kernel features outstanding detection abilities, together with high performance. You can expect 100% detection of In-the-Wild viruses (viruses already spreading between users) and excellent detection of Trojan horses.
   • The kernel is certified by ICSA; and frequently takes part in the tests of Virus Bulletin magazine, often yielding the VB100 award.
   • The avast! engine also features outstanding unpacking support. It can scan inside the following archives: ARJ, ZIP, MIME (+ all associated formats), MAPI (Outlook pst files), DBX (Outlook Express archives), RAR, TAR, GZIP, CAB, BZIP2, ZOO, ACE, ARC, LHA/LHX, TNEF (winmail.dat), CPIO, CHM, RPM, ISO, 7ZIP and SIS. It also supports a number of executable packers (such as PKLite, Diet, UPX, ASPack, PeShield, FSG, MEW etc.).
   • Last, but not least, it can also scan for viruses hidden in Alternate data streams on NTFS volumes.
4. Simple User Interface
   • The Simple User Interface is used to start on-demand scanning, work with the results and change various options. Basic resident protection settings can be modified here.
   • The Simple User Interface is the main application of avast! 4 Home Edition. You can start additional avast! modules from here, such as the Virus Chest, Updater or Log Viewer.
   • The appearance of the Simple User Interface is very flexible. It supports so-called skins, allowing users to change the appearance of the application interface. The main package contains three skins, with additional skins available from our web pages.
5. Standard resident protection
   • Resident protection (the real-time protection of the operating system), is one of the most important parts of an antivirus program today. avast! features a powerful resident module that is able to detect a virus before it has any chance to infect your computer.
   • avast! Home Edition contains resident protection of the computer file system and a resident module for e-mails and news.
   • File system protection ensures that no virus will be started on the computer. It offers a wide range of settings, such as the possibility to specify that files will be scanned during copying, or that the scanning will include files with given set of extensions only.
   • E-mail/News protection consists of two independent modules; first, there is a generic scanner working on the SMTP/POP3/IMAP4/NNTP protocol level. It is capable of protecting any existing e-mail client that uses these protocols. Second, there is a special plugin for MS Outlook only; the mail scanning is completely transparent, requiring no special settings.
   • A new feature of version 4 is heuristic analysis of e-mail scanners. This feature can protect against new, unknown viruses and worms that are not possible to detect by the usual means. The heuristic module performs a thorough investigation of every e-mail message and watches for suspicious signs, that might announce virus presence. When the number of those signs exceeds a user-defined level, the message is considered dangerous and the user is warned.
6. P2P and IM Shields
   • Avast features a module for the protection of IM (Instant Messaging, "chat") programs, and a module for the protection of P2P (peer-to-peer) programs. The list of supported IM and P2P programs is extensive with more than 30 programs currently supported.
   • While chat itself would not impose any serious security risks in terms of viruses, today's IM applications are far from being just chatting tools: most of them support more or less sophisticated file sharing methods - which may quite easily lead to virus infections, if not properly monitored.
   • The P2P protection module doesn't need much explanation - on today's P2P networks (such as Kazaa) there are thousands of infected files, and an effective protection is a must.
7. Network Shield
   • A new resident protection module was added to avast! 4.5: the Network Shield. This module provides protection against known Internet worms/attacks. It analyses all network traffic and scans it for malicious contents. It can be viewed as a lightweight firewall (or more precisely, an IDS (Intrusion Detection System)).
8. The Network Shield is only available on NT-based systems (Windows NT/2000/XP/Vista).
9. Web Shield
   • Web Shield is a unique feature of avast! that enables it to monitor and filter all HTTP traffic coming from the Web sites on the Internet. Since an increasing number of viruses (and other malware, such as adware, spyware and dialers) are being distributed via the World Wide Web, the need for an effective countermeasures has also increased. The Web Shield acts as a transparent HTTP proxy and is compatible with all major web browsers, including Microsoft Internet Explorer, FireFox, Mozilla and Opera.
   • Unlike most competitive solutions, Web Shield's impact on browsing speed is almost negligible. This is because of a unique feature called "Intelligent Stream Scan" that lets the Web Shield module scan objects on-the-fly, without the need of caching them locally. Stream scanning is performed in operating memory only (without the necessity to flush the contents to disk), providing maximum possible throughput rates.
10. Automatic updates
    • Automatic updates are another need in virus protection. Both the virus database and the program itself can be updated automatically. The updates are incremental, with only new or missing data downloaded: thus reducing the transfer heavily. The typical size of a virus database update are tens of KB; program updates are typically in the hundreds of KB range.
    • If your Internet connection is persistent, the updates are performed completely automatically at fixed time intervals. If you connect to the Internet only occasionally, avast! watches your connection and tries to perform the update when you are online.
    • Having an up-to-date virus database and antivirus program is the most certain way to protect your computer.
11. Virus Chest
    • The Virus Chest can be thought of as a folder on your disk drive, having special properties that make it a safe, isolated place suitable for storing certain files. You can work with the files in the Chest, though with some security restrictions.
    • The main properties of the Virus Chest are complete isolation from the rest of the operating system. No outside process, such as a virus, may access the files inside, and the fact that the files inside the Chest may not be run (executable), there is no danger in storing viruses there.
12. System Integration
    • avast! antivirus features outstanding integration into your system. A scan can be started directly from Windows Explorer, by clicking a folder or a file with your right mouse button and selecting the corresponding choice from the menu.
    • A special screen-saver is also provided, that, when running, performs virus scanning. avast! antivirus works together with your favorite screen-saver, so you don't have to change your personal settings to use it.
    • A new option with this release is the boot-time scan (Windows NT/2000/XP/Vista 32bit only). This important feature allows a user to instigate scanning before a virus is activated, in the case that a virus is suspected to be active on your computer already.
13. Integrated avast! Virus Cleaner
    • Since version 4.1, avast! includes the Virus Cleaner, a tool designed for a complete removal of most common infections from already-infected computers. So now is avast! capable even to reliably heal (not only detect) the most common malware.
    • The number of viruses/worms supported by the Virus Cleaner is constantly growing. For the most up-to-date information we suggest to visit Cleaner's own page (for emergency purposes we also offer the Virus Cleaner as a standalone product, capable of running without installed avast).
14. Support for 64-bit Windows
    • avast! Home/Professional now fully supports the 64-bit Windows platform. ALWIL Software is anticipating massive take-up of this platform, as Windows XP 64-Bit Edition will support up to 32 GB of RAM and 16 TB of virtual memory, enabling applications to run faster when working with large data sets. Applications can preload substantially more data into virtual memory, allowing rapid access by the 64-bit extensions of the processor. This reduces the time for loading data into virtual memory or seeking, reading, and writing to data storage devices, making applications run faster and more efficiently.
    • Regular (32-bit) antivirus applications are unable to operate correctly on the 64-bit Windows platform because they rely on 32-bit kernel-mode drivers. The new avast! uses native 64-bit drivers, delivering the same level of protection as in the 32-bit Windows environments. The installation package is the same for 32-bit and 64-bit versions - the setup program automatically detects the operating system it is running on, and installs all necessary files. You may find more information on avast! Antivirus and Windows x64 Edition page.
15. Internationalization
    • Commitment to internationalization is one of the key benefits of avast!. During the last 2 years, avast! has been translated to a number of languages and the latest version added additional language modules. Currently the list of supported languages is: English, Bulgarian, Chinese (both Simplified and Traditional), Czech, Danish, Dutch, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Malay, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish.