David Cooksey,
first thing to do is have a look at the virus, malware, section on the forum see if you can find the same sort of symptoms your having and follow the procedure laid out download a series of tools that you can boot to and run and update. Also check out Britec's videos on youtube check this link out maybe just what your looking for
http://www.briteccomputers.co.uk/forum/tutorials-and-how-to/black-screen-fix-for-windows-that-some-users-are-seeing-after-security-upates/
Good luck take care
tmy
