There are Linux antivirus distros available, but they are meant to scan a Windows system, not a Linux system. Halo, when finished, will scan a Linux system for viruses, as well as include security auditing tools for additional tests of the system.
A tool built on Linux to use for multiple Windows OS preservation applications; these include malware removal, registry patching, and mitigation of system file damage for any Win2K, XP, Vista, and Windows 7 system.