Bitcomet bugging on me

Hello, lately every file that i download turn into .file which can’t be read or interacted at all, i tried to reinstall but nothing really changed, is it a bugg or something wrong with my pc?

That sounds more like a Windows fault. Check your file associations and see if there’s anything out of kilter there

Run a full anti-virus scan on the complete installation.

You may have to do a complete 'format C' and reinstall everything