Here is a compiled list of working/non-working list of anti virus software for Vista Beta 1: Avast Home 4.6 (I'm using now), and if IE doesn't work after installing it, disable web shield (x86,x64) AVG 7.0 Free (some users reported that it doesn't work, update also doesn't work etc) (www.grisoft.com) (x86) AVG 7.0 Pro KAV Nod32 SAV10 SAV9 (x86) SAV8.1 (x86) TrendMicro Small Business (x86) Trend Micro Client/Server Suite (x86) Mcafee Enterprise 8.0i (x86) CA's eTrust AV 7.1 (under XP Compatibility, x64) Sophos Enterprise (x86) Can't work (or with problems, users reported): Norton AV (most Norton AV wouldn't install. In fact it can't be installed! LOL) SAV10 (few users getting blue screen) (x86) AVG 7.0 (few users) McAfee 9.0 McAfee Virus scan 9.1 OneCare (for XP SP2 only) Nod32 (x64) Norman Virus Control 5.8 (x86) PC-Cillin 2006 and previous versions F-Secure 2006 beta Norton Anti Virus 2003 (works except for Auto Protect) Panda AV But I would want to add that being able to install the AV doesn't mean that it is giving you the necessary protection. It appears to be working, but doesn't mean that it can catch whatever virus in the wild. A simple test has been done by John D. Sinks that KAV and NOD32 and Avast Home 4.6 caught all test virus on Vista when he tested it out. So I would recommend using any of the 3 AV. Note: Vista's Security Center might not detect your installed AV, and this is a known issue. -- Jabez Gan http://www.blizhosting.com