Free forefront security software for windows

Forefront Security for Exchange is a powerful tool that protects organizations against the latest threats Forefront Security for Exchange Server includes multiple scan engines from industry-leading security firms that are integrated in a single solution to help businesses protect their Exchange messaging environments from viruses, spam, and worms.
Forefront Security for Exchange Server ships with and integrates multiple industry-leading antivirus engines to provide comprehensive, layered protection against the latest threats.
Through deep integration with Exchange Server, scanning innovations and performance controls, Forefront Security for Exchange Server helps protect messaging environments while maintaining uptime and optimizing server performance.
Forefront Security for Exchange Server also enables administrators to easily manage configuration and operation, automated scan engine signature updates and reporting at the server and enterprise level.
Forefront Security for Exchange Server provides protection specifically designed for Exchange 2007 servers. Forefront Security for Exchange Server is an on-premise solution that provides protection for Exchange 2007 Edge, Hub and Mailbox servers.
Customers who purchase Forefront Security for Exchange Server to protect Microsoft Exchange Server 2007 will also be licensed to use Microsoft Antigen for Exchange, Microsoft Antigen for SMTP Gateways, and Antigen Spam Manager to protect their Microsoft Exchange 2000 Server and Microsoft Exchange Server 2003 environments.
System requirements:
- Supported Operating Systems: Windows Server 2003 R2 Enterprise x64 Edition; Windows Server 2003 R2 Standard x64 Edition ; Windows Server 2003 R2 x64 editions; Windows Server 2003 x64 editions; Windows Server 2003, Enterprise x64 Edition; Windows Server 2003, Standard x64 Edition
- Exchange Server 2007 Beta 2
- x64 architecture-based computer with:
- Intel Xeon or Intel Pentium Family processor that supports Intel Extended Memory 64 Technology (Intel EM64T) or AMD Opteron or AMD Athlon 64 processor that supports AMD64 platform
- 1 GB of Available Memory
- 300 MB of available disk space

Microsoft Forefront Client Security provides unified malware protection for business desktops, laptops, and server operating systems that is easy to manage and control.
Built on the same highly successful Microsoft protection technology already used by millions of people worldwide, Forefront Client Security helps guard against emerging threats, such as spyware and rootkits, as well as against traditional threats, such as viruses, worms, and Trojan horses.
By delivering simplified administration through central management and providing critical visibility into threats and vulnerabilities, Forefront Client Security helps you protect your business with confidence and efficiency. Forefront Client Security integrates with your existing infrastructure software, such as Active Directory, and complements other Microsoft security technologies for protection and control
Supported Operating Systems: Windows 2000 Service Pack 4; Windows Server 2003 R2 Enterprise Edition (32-Bit x86); Windows Server 2003 R2 Standard Edition (32-bit x86); Windows Server 2003, Enterprise Edition (32-bit x86); Windows Server 2003, Standard Edition (32-bit x86); Windows Vista Business; Windows Vista Business 64-bit edition; Windows XP Service Pack 2
To use Microsoft Forefront Client Security beta software on a single-server topology, you need:
- A computer with a minimum 750 MHz processor; dual 2.85 GHz or faster processor recommended
- Microsoft Windows Server 2003 Standard Edition or Enterprise Edition, or Windows Server 2003 R2 Standard Edition or Enterprise Edition
- Minimum 1 GB of RAM; 4 GB RAM or more recommended
- 6 GB of available hard-disk space or more required; 100 GB or more recommended
- DVD-ROM drive
- Super VGA or higher-resolution monitor
- Keyboard and Microsoft Mouse or compatible pointing device
Software prerequisites for Microsoft Forefront Client Security server are:
- Microsoft SQL Server 2005 Enterprise Edition with Service Pack 1 (including Database Services, Reporting Services, and Workstation Components)
- Microsoft .NET Framework 2.0
- Microsoft Management Console 3.0
- Group Policy Management Console with Service Pack 1
- Windows Server Update Services 2.0 with Service Pack 1
To install Microsoft Forefront Client Security agent component on Windows operating systems, you need:
- A computer with a minimum 500 MHz processor; 700 MHz or faster processor recommended
- Microsoft Windows 2000 SP4, or Windows XP Service Pack 2 (32-bit x86 or x64), or Windows Vista Business (32-bit x86 or x64), or Windows Server 2003 Service Pack 1 (32-bit x86 or x64) or later
- Minimum 256 MB of RAM or more recommended
- 350 MB of available hard-disk space or more recommended
- Keyboard and Microsoft Mouse or compatible pointing device
Software prerequisites for Microsoft Forefront Client Security agent component are:
- For Windows 2000: Update Rollup 1 and GDI+ installed
- For Windows XP Service Pack 2: filter manager rollup package installed
- Windows Update Agent 2.0
- Windows Installer 3.1

Microsoft Forefront Client Security provides unified malware protection for business desktops, laptops, and server operating systems that is easy to manage and control.
Built on the same highly successful Microsoft protection technology already used by millions of people worldwide, Forefront Client Security helps guard against emerging threats, such as spyware and rootkits, as well as against traditional threats, such as viruses, worms, and Trojan horses.
By delivering simplified administration through central management and providing critical visibility into threats and vulnerabilities, Forefront Client Security helps you protect your business with confidence and efficiency. Forefront Client Security integrates with your existing infrastructure software, such as Active Directory, and complements other Microsoft security technologies for protection and control
Supported Operating Systems: Windows Server 2003 R2 Enterprise Edition (32-Bit x86); Windows Server 2003 R2 Standard Edition (32-bit x86); Windows Server 2003 Service Pack 2