Freeze while saving Material

Hello everybody! I’m new in the UE scene but not into computers and while saving my new material, the editor freezes for about 12 secs. I know that it’s not that much, but the entire editor freeze and the CPU is near 5% while this happens, so no CPU problem and makes it difficult to test and preview material edit.

UE Version: 4.21.2-4753647+++UE4+Release-4.21

dxdiag: dxdiag - Pastebin.com

Thanks for any hit you may have!