White screen before login?

[RockySP]

Yesterday I used the disk cleanup tool in windows 10 to clear a few gigs of space from my hard drive. Now I’ve noticed that when booting into windows there is a white screen for a second or two just before the login. I’m just wondering on how to fix this?

 

[Ralston18]

Cleanup tool may have taken out some file and the problem began. Or, conversely, some file was taken out and a buggy version was reloaded or reinstalled.

"White screen" may be simply the OS looking around and trying to figure things out - stops sending any video signal (for whatever reason) until some issue is resolved.

I would download and reinstall the video card drivers. Then check the overall video card configuration.