Screen goes completely grey when using Snipping Tool in Windows 10

Screen often goes completely grey when using the Snipping Tool in Windows 10. However, it works sometimes. I checked this webpage, but still need a solution. This happens using Snipping Tool on any program, not just Internet Explorer. How can I fix this?

I too was having this issue and found that Comodo Smart Shopping had installed with Comodo Internet Security. Uninstalling resolved the screen greying out issue.

It's normal for the screen to go gray when taking a "rectangular" or "free-form" snip.

Also, Snipping Tool will open in the last-used mode, so on any given startup the screen may be grayed or not.