Slow down all games

Don't know where to post a topic, I write here. In General five days ago noticed that started right. all the games I played earlier without any problem. I mean, last month I quietly Outlast 2, and a third recent game Control. The control was normal. But today I went to the Control to continue and found logogram. Checked the old games - Serious Sam 3, Skyrim, hard no lag but there is a nasty drawdown fps to 15 despite the fact that previously everything went smoothly. By the way the Internet has also become right., not much, but pictures long progruzhat
Config FX-6100, GTX1050ti 4 GB, 8 GB RAM. Such was the case in the beginning of this year and it was solved by changing the thermal paste on the CPU (warming up) so thermopaste even a year old yet (like the wind)
Did that already
- Cleaned the system unit from dust (but I clean regularly)
- Checked Avz, Nod32, Сureit, Loaris Trojan remover and unhack mi - Loaris supposedly deleted a bunch of suspicious files, unhackme wants to remove all cracked ekzeshnika, the rest of antiviri find nothing
- Cleaned the registry and debris
They have released 50% of the space on the hard drive.
- Checked the Aida temperature, percent idle is heated to 45 games up to 65, did not seem very much
The lag remained. What options are there yet, help