Really? Your name is Pollywolly?
Sounds like you got a Norton-esque type of AV from your SP. True, the price is great, but you get what you pay for.
2
free AV's are available online and they're pretty decent and very popular for home PC users.
AviraAvastThe best place to get & keep things up to date is
Filehippo.
Don't trust unknown sites or ads. The tech community recognizes Filehippo, all the products they display are clean from virii and malware, etc.
With your current AV it sounds as if you added anything else to your PC you'd come to a screeching halt. So #1 priority is uninstall that behemoth and install
1 of the 2 I mentioned above. Both are excellent. It's up to you. I use Avast myself.
As for CCleaner...it's small and it is excellent. (Somebody has to show me how to do a cartwheel right now!) It's Cleaner gets rid of internet cache and a whole lot more, but internet cache is the main culprit. As for it's Registry cleaner, it's very safe, but as always, run it quite a few times and get to
recognize the files it catches before you delete anything. Remember to perform a 'System Restore save' before you run the Register cleaner and delete things. That way you have a backup.