How can I get back into my computer after something malicious took it over?

Episode 943 (1:21:04)

Bruce from Glendale, CA

Bruce got a virus on his computer that's preventing him from gaining full access to his computer, and is asking him to pay $300 to get it back. Leo says to try starting in safe mode. If he has access to another computer, Kaspersky offers a rescue disk that he can download and make a CD that he can boot to on his computer. Once he gets access to his data, he should wipe the drive and reinstall Windows from a known, good source.