Somehow KEYHolder virus got on my Windows PC and it has encrypted all my files. Due to this infection my Word, Excel, Powerpoint and some JPEG Pictures cannot be accessed. I don’t know how to get them back. Also, the malware asking me to visit some websites and pay with Bitcoins to recover my files. I have downloaded some free antivirus program too but it didn’t deleted the virus. Please help me to eliminate KEYHolder threat completely from my system.