Interesting that I just found this out recently that my KTS suddenly wasn’t working anymore and same as my Windows Defender. I also notice when when I go Windows Security its EMPTY! Same issue when I try to restart KTS it says that it can’t be found. I tried to reinstall KTS and nothing happens, tried quickly another AV quickly but a free check, couldn’t find it. Been using Kaspersky for maybe 10yrs I think, never failed me. I am not sure how long was my laptop infected. Took out the SSD and is will be scanned by another laptop with KTS, we’ll see if it will find it.