Solve : virus keeping user from start-up screen?

1.	Solve : virus keeping user from start-up screen?
Answer» Some type of virus has caused the following problem: After log-in, an Anti-Virus PROTECTION PROGRAM immediately downloads and scans for viruses, followed by a window that asks for registration. I understand that this is BOGUS and some type of Ad-ware or Malware, but I can't seem to get past that scan or registration screen to any kind of start MENU. Neither window has a close button, and although I was able to finally close the window using "alt + f4", my Start toolbar is nowhere to be found. I tried the "ctrl + esc" as well as the windows button to no avail. I can't seem to take a step TOWARD removing this virus without at least getting to the Start menu. Any suggestions?

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