See: http://support.microsoft.com/default.aspx?kbid=884130 (A number of programs, such as Norton Antivirus...may have problems) See: http://blogs.pcworld.com/staffblog/archives/000167.html (Anecdotal data on PCs getting hosed) Source of Above: http://langa.com/newsletters/2004/2004-08-26.htm Jeff S.