My antivirus says that I’m all clear, but my computer is running unusually slow and doing everything it would do if it were infected

@helenS I haven’t done this in so long I forgot about it. I’ll look up how to do it on YouTube and refresh myself. What’s this task called exactly?

@DeluxedEdition I think on MS Windows it's called Task Manager.

@DeluxedEdition You might find that you prefer two alternative options – Process Monitor or Process Explorer.

Both are free tools that you can install on your Windows 10 PC. They include the same information you can see in Windows Task Manager and a whole lot more as well.

@helenS

@helenS disk keeps fluctuating dramatically

@DeluxedEdition Looks like you may need more storage volume.
There are tools to sort all directories and files on your disk according to their size. They may take a while to run.
Some process is filling your disk with huge temporary files most likely.