I tried norton 2010 beta and did a couple of scans but after that I got an error saying that it couldn't be founnd so I uninstalled it and installed F-SECURE . I found that it id compatable with Windows 7 RC and works very good and I'm covered until Jan/01/2010 . It's free and works with Windows Defender . I haven't had any scanning problems .

Oh my, another vote for Norton, LOL (wink, wink)Drew - MS Partner / MS Beta Tester / Pres. Computer Issues