Laptop suddenly decreases in performance after no use for a month

[YourNewPalAlex]

Some of you who have seen my older topics, the laptop is back, i gave it away for a month so they fix it and they infact fixed it. Only one problem, after getting the laptop back performance has been lacking. I replaced the thermal paste so i dont think thats the problem. I did do some win 10 optimization which did help but it wasnt back to the original performance. Do you think windows is STILL the problem? keep in mind this is pretty much a fresh install, with everything updated and such. For updates wise, windows hasnt changed before i gave the laptop. Still the same 1809 windows october update lol. I tested games that werent updated and it really wasnt the same, i wouldnt be typing this if i had a high end laptop, but when your with a dual core and an intel hd 4600, the extra 15-20 Fps in csgo really makes it un playable. Then i had 30/5- 40, now i have like 15-20. But the windows thing really helped, now i have like 20-25 but still now what i had before.