I seem to have this tough virus that scans my computer for viruses and then asks me for a payment to get rid of it. I searched the data base and saw several earlier questions so I tried the solutions but they didn't work. I tried Malwareytes and SmitFraudFix. It got riid of the back ground srceen that has the "Warning your're computer..." but it still boots up and blocks many if not all the startup applications like "mcagent.exe", etc I can't launch any prorams like Explorer because it says it's infected. It has a pop up that is named "System Tool" thst does the scaning of my computer and says I have viruses. My compuiter is completely useless and this virus seems to ba a tough one to get rid of. Any ideas ?