After my motherboard replacement from Asus Maximus VI Formula to STRIX-Z270F-GAMING-ASUS now sytem is slow sluggish like when click on explorer.exe takes like 3-5 seconds on previous one less then 1 second it was instant. even opening a taskbar CPU spikes to 100 and comes down.
Note: i did not format my windows 10 64 bit.
Please advice.
[Solved]