After removing Windows Defender from my XP SP2 machine, the keyboard is completely ignored when the Windows log-on screen is requesting my password. Not being able to log on also stops me from using any Start/Run command. Although the BIOS is allowing to boot from the installation CD, it will not boot. I can start up in Safe Mode (and the keyboard works OK here), I cannot get anywhere without going back through the log-on screen. I've also tried another PS2 keyboard as well as a new USB keyboard with the same results. The WIndows+U command won't work because I have to be in Windows first! I managed to get to a DOS prompt by using an old Win98 boot-up disk and I can read my hard-drive files as well as the installation CD but any executables on the CD say that they must run using Windows. I've been working on this for almost two weeks and would appreciate some ideas of what I can do. Thanks in advance!