It's not an antivirus, it's vacuum cleaner from fools pockets. It know and can only detect 100+ viruses from good old MSDOS time and request money to use it. There are a lot of FREE antivituses that you can use to scan you PC. Google for DrWeb CuteIt for example. You don't need to buy anything from this dev premine to use it. Cureit is FREE.
Don't thank me, but it you want you can send me money that you safe