Is it worth it to clean the system from viruses?

Question

Malware

There are PC with viruses. In principle, the user does not complain, however, flash drives cannot be inserted into this computer.
I have dealt with virus cleaning several times, and in 75% of cases it ended with a BSOD, or a dump of system components. At 20%, the system seemed to work, but with long use, errors come from the most unpredictable places. And only in 5% of cases it is possible to completely clean out the virus.
Tell me, please, is it worth it to clean viruses or is it better to reinstall Windows?

Answer 1

Reinstall if possible.
If not, then KVRT and CureIt! to help. Then polish again with sfc /scannow.

Answer 2

You can do it this way and that, but the result will be the same - if the user does not complain, soon there will be the same zoo.

Answer 3

if the infection is serious, then only the format of all hard drives is zero, for example, the HDDLLF.4.40 porg (1tb hours 12). + flashing the router.
after installing a new OS, maximum hardening on points.