What’s UPS stand for?

Just curious, so once you noticed that your machine is compromised. You didn’t bother to take it off the network?

Here’s what I would do:

1. take it off the network
2. scan the PC (off network and not with Kaspersky).
3. if any important file isn’t compromised, back those up.
4. nuke the HDD/SSD. I would use Killdisk but format would probably do.
5. reinstall OS and whatever you need after.

Best check all the machines on the network as well. Since you don’t exactly know how you got compromised, there are chances that other machines on the network are compromised as well.