So which AV do you use now ? Maybe you didn't set it to detect PUP's ?
If you happen to have one of the popular AV's like Avast, Kaspersky, etc. then chances are that it has installed unwanted bloatware with it. This includes :
"optimizers" of any kind
I won't go too much into details, but most, if not all of the above mentioned are either useless / have better alternatives / are designed to suck money out of you by any means
You can remove then via programs & features in windows or in the AV's settings.
Edited by Daniel_Boringcliffe, 27 August 2017 - 04:53 PM.