I found these instructions on a website. I'm not sure if they will work, but you could try it.
press ctrl+alt+del
locate and terminate the process ctfmonb.exe
search the hard disk and delete the following files
blackster.scr
ctfmonb.exe
Edit: Someone else posted this in response to the first question:
" What noe provided in the 1st response fixed my issues as well. I'll copy/paste the 1st method that I used. Thanks noe!
Note: the file ctfmonb.exe did not exist in my processes. I did have ctfmon.exe (missing "b") and I removed that. Everything has been working fine! "
Hope it works for you
Not trying to be a fanboy. Of course, it's hard when you own the best console eve... dang it