I have a slow desktop where I may just reinstall Windows 10 which is
probably the best way to fix it.

But if I can't easily reinstall Windows 10 I'll run some malware scans but
they make me crazy by false reports (for example, malwarebytes flags the
common mvp hosts file as trojan.agent malware).

The windows malicious software removal tool heuristics found uninstalled
programs as malware, so, that's not useful either (as they were automatic
hostname changers).

Can you give me advice on some of the best free Windows 10 malware checkers
to try next that don't have so many false flag reports?