Cannot close CIS Program UI

I opened CIS, and after I was done checking something, I noticed, that I couldn’t close the UI! The close button was grayed out, and I couldn’t use the Jumplist>Close Window to close it either. I had to eventually just Alt+F4 it to close. (See Screenshot)

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Are you using a tool like Windows Blinds to change the looks of Windows? If so try disabling it.

I am not. I have to reinstall Windows tomorrow, and am doing a memory upgrade, so I’ll post back with an update to see if anything has changed.