Free online virus scan software for windows

Active Virus Shield is a free anti-virus program for your PC that will combine traditional antivirus programs, stopping them before infecting your computer.
Active Virus Shield is brought to you as a free service of AOL and is based on Kaspersky Labs award winning Personal Anti-Virus.
Active Virus Shield seamlessly integrates with the Microsoft Windows family of operating systems and is compatible with other PC protection programs (firewalls, anti-spyware, etc.). Like other anti-virus programs, using Active Virus Shield may require that you uninstall other anti-virus programs to avoid product incompatibilities.
Highly Effective Antivirus Protection. Active Virus Shield utilizes the latest technology to do both traditional signature-based detection, as well as in-depth scanning of executables. This helps protect against a broader range of known and new viruses, reducing the chances of a virus infection on the users computer
Main features:
Real-Time File Protection. All individual files, catalogs and disks can be scanned for viruses or, to cut down on scan times, Active Virus Shield allows users to focus attention only on critical areas of the operating system. In either case, Active Virus Shield serves as a watch-dog, continuously monitoring and helping to protect files. Active Virus Shield can also scan faster by scanning only new and changed files.
Email Protection. Active Virus Shield supports most e-mail clients (e.g POP3, IMAP or NNTP) to scan incoming email and SMTP protocol to scan outgoing mail. For popular mail programs, like Microsoft Outlook and Microsoft Outlook Express, plug-ins and routines for treatment of viruses in email databases are also available.
Automatic Hourly Updates. Active Virus Shield checks for available updates every hour which helps to ensure the product is up to date with the latest features and virus signatures

McAfee Virus Definitions 5828 will improve the protection against computer threats for your PC. It is a manual update package designed for users who can not use the automatic update.

Virus definition, or .DAT, files contain up-to-date virus signatures and other information that Network Associates anti-virus products use to protect your computer against the thousands of computer viruses in circulation. Network Associates releases new .DAT files regularly to provide protection against the approximately 300 new viruses that appear each month.

The DAT files are compatible with McAfee products that use the version 4.3.20 (or later) virus-scanning engine. It is recommended that you upgrade to the latest version of the virus-scanning engine for optimal virus detection and cleaning.

My-Virus-Protection is a software available for Windows. Protect your computer from viruses, worms, trojans. If the PC its already infected software will scan and remove viruses, worms, trojans. Easy to use, no skills are required.