Sihina
use Malwarebytes cyber security
and use bleachbit-
When your computer is getting full, BleachBit quickly frees disk space. When your information is only your business, BleachBit guards your privacy. With BleachBit you can free cache, delete cookies, clear Internet history, shred temporary files, delete logs, and discard junk you didn't know was there
Remilia
Download an antivirus.