Error was encountered when opening the flies for this DVR event

Hello,
Recently I made some changes in my Windows hoping my PC will run easily and I will get better performances. It worked fine for two days when this morning I got this error. Can anyone help me to fix this please without reinstalling my Windows? Can this be solved without losing any data?
Thank you!

Time Left: 0:07
A problem was encountered when opening the flies for this DVR event.
Please note the Error Code: 06
