Question Mouse Lags When CPU on Load (Opening Window or Program)

[JestermanvII]

Hello guys I recently started to encounter a problem that was not before.While my computer is opening any program, my mouse starts to lag until that program opens.I have not encountered this problem before.I reinstalled the windows but it didn't solve the problem.
PC Specs (WIN 10 Home Edition x64)
R3 1300X
ASUS B350-M A
MSI 1050Ti GAMING
8GB 2666 MHz
My CPU and GPU Temp mean 39 Celcius
On Max Load CPU Reaches 68 GPU Reaches 65

I put my CPU on stress test i did not see a lag problem.

 

[rgd1101]

hdd or ssd? check their health?
if it is ssd, how full it is?
malware scan?