After 2 years I decided to do a complete reinstall of my computer because the fear that someone is watching behind my back, so after 3 hours of reinstalling and reconfiguring Windows I decided to download some torrents because I don't have money at the moment and I already paid for a Kaspersky license. But I was so stupid to run the keygen in a VMware station or Sandbox, and now i'm afraid that I have a silent trojan in my PC. Normally I always scan keygens with my own Kaspersky and Virustotal, but because this was a trusted user on TPB I didn't scan the keygen before execute it. Are there spyware/trojans who undetectable by antivirus software or Virustotal? How can I see the difference when a file is reported false positive by VT? I know that downloading torrents is not good, but because i'm a poor student I don't have the money for buying all that software. I'm doubt about performing a second reinstall, but i'm tired, how can I be sure that I don't have a Trojan? I have scanned the files with Virustotal, am I allowed to posts the results of VT?