Windows xp boot errors

This is a bit sticky. If you have already ran Norton and spyware removal the problem must be either some yet undetected virus/spyware or badly writen software conflicting with your system. First things first. XP has something called system restore. Try using that to roll back your operating system. Go to start programs then accessories and system tools. Then run system restore. You should be able to restore the system an earlier date. This may or may not work. The other option is to put the xp cd in the drive boot the computer and hit a key when is says "press a key to boot from CD" then you can install XP over itself. It should give you an option to repair the installation. Also you may want to turn system restore off and retry the spyware removal tools. System restore will sometimes put files back that you delete automatically. You can do that by right clicking my computer and going to properties. Then choose the system restore tab. Check the box to turn it off. It may take several tries to fix the problem. Try these things and let me know if you need any more idea to try. Also make sure any vital data like word documents etc are copies to floppy or cd or something.