What’s going on? My computer was fine until today. Today I opened my laptop and discovered that my files can no longer be opened or edited. Wtf??? The only thing I found was BTC_DECRYPT_FILES.txt file on my desktop. it says I need to write to zikr@protonmail.com and several similar email addresses to get my files back. Am I being blackmailed by cyber criminals? Are they going to ask a ransom or something?? How can I fix this issue and make my files usable again??