If you can boot into safe mode that should do the job even easier, but if not then its all OK I should think. You'll obviously need to start a need task for explorer.exe and then you need to get into your internet browser and download a Anti Virus Program (bare in mind most viruses can disable these, which is why safe mode is a good thing to have running) I would recommend using Malware'Bytes as it can detect almost anything, don't torrent it, you don't need the pro version. And run the virus scan and it WILL sort it, if it doesn't sort then you WILL have to format your computer by no means, which will mean you will have to torrent it and burn it to a disk or use the Windows ISO USB Maker tool from Microsoft and then boot into a new OS.