I was stupid and downloaded a piece of software, and before I checked it with the antivirus I have activated, intalled fine, but when opened a crack it asked if I want to open, then offered to open through the Windows Media Center and nothing happened, but then now every single icon of the programs looks like media center document, and when I click on anything it launces it!! How do I go abput undoing it?? I have a Viao laptop.. And I don't believe I have a restore disk