Thanks for reply Marcos. Yes, I installed after virus infection only. Was using the Windows Security only. I am really not aware how this thing came into my PC and ruined everything. I can tell that before this infection, there were some adware working through auto start of Microsoft Edge and directing to some sites. I had to do a intensive malware scanning. Though, I think i removed all malwares from system, I am still not sure of recovering my files. These are really important files. Please help if there is any way to get the files decrypted. 😪