There is a little window that is continually popping up throughout the day. I cannot even click on 'cancel' it dissappears so fast & then reappears. It is almost schizophrenic! It will stop for a small period & then start again. I have no idea what to do.I tried system restore, looked at task manager, etc. but I am lost....HELP!

You might try Methods 3 and 4 of this article: http://support.microsoft.com/kb/2438651If that doesn't work, you might reply back here with a list of programs you have installed lately.