New answers tagged extension
might be a ransomware virus with encryption. There are some out there which can't be broken (encrypted by AES256) and you'll need to pay to get files back. could be 50 - 100. Try to Drag & Drop the file into Word or Video Player You can't change the extension because of either: the virus is still active and changing it back each time you change it. ...
You should be able to just change the filename to whatever extension you need. Windows will confirm that you're changing the extension, but unless the file was corrupted or changed beyond the extension it should work fine.
Top 50 recent answers are included