comp too slow may have virus
Should I erase the entire drive or ?
Macbook pro catalina
Question marked as
You can try reinstalling your existing OS over itself. Follow this support article for more help: https://support.apple.com/en-us/HT204416
If you want to check for malicious software, many people here recommend Malwarebytes.
Whichever you choose, erase and restore, or a reinstall, please be sure to make a full backup of your current hard drive. (Either with Time Machine, or a different service of your choosing.)
See Step 2 in these instructions for how to backup your Mac: https://support.apple.com/en-us/HT201475