Windows 10 suddenly started lagging at programs and games!

[1984vinyl]

Windows 10 suddenly started lagging at programs and games!
Everything was running smoothly on my new PC, until 2 or 3 weeks ago everything changed:/
GPU driver is updated ( windows too), and it still lags in games and programs… I’ve seen all the posts before about windows lagging, but I still can’t find the right answer for my case...

Please help!

i7-8700k
GTX 1080Ti
Asrock z370 extreme4
Nvme Samsung ssd 960
32G ram
Direct X 12

 

[Lutfij]

Make sure you're on the latest BIOS update for your motherboard. Try and perform a repair install and see if the issue is averted.

 

[ElectrO_90]

Install the following
ZHPCleaner = check for malware
HD Sentinel = check for damaged HDD/SSD

 

[Peter Martin]

Try a system restore to when it works. Then don’t update anything