ransomware .zwer

This means that your files are encrypted an online with key. Only the authors of the zwer ransomware have this key, so the only way to decrypt files is to pay a ransom. BUT you have a small chance to recover the contents of encrypted files, as shown in the following guide – https://www.myantispyware.com/2019/12/04/how-to-recover-encrypted-files-ransomware-file-recovery/