Notice that a lot of guys in here don't rate resident AV too highly, and I tend to agree that it causes nearly as many problems as it cures. That said, XP without some form of protection is a mite too vulnerable to attack. Might be worth mentioning a utility I coded for internal use, but then decided to release under the GPL, which you can download from sf.net/projects/softwarepolicy This gives XP (any SP2+ version) protection against the launching of potentially unwanted software from download folders, USB sticks, CD, etc. Unlike Win7's UAE there are no annoying popups, and when installing legit software you can turn-off the protection without rebooting, from a system-tray menu. Still in beta so use at your discretion. Although, has been in-use internally on a good number of computers for several months without any issues. Also works on Vista/7 32-bit provided that UAE is disabled first, and might be found preferable in some circumstances. The latest version should also work on all 64-bit platforms, though this has not been thoroughly tested. Installer MD5:B3A67C2D467F359A1F0589B36B01E6BA SoftwarePolicy.exe MD5:3F094761AEB34DBDE394F8A35941D3E1 Opinions/comments welcome.