I'm having a problem with Explorer ribbon's background color. The background color of the ribbon should be grey but sometimes it switches to white for some parts of the ribbon while the rest is grey...

Update:

For an unknown reason, both apps started to work fine the next day on their own. It may have been a glitch but I still would be happy to know and learn about that issue.

Hello. I have been using Windows 10 (home) for a while and I know my way around generally. Today, I'm having a weird issue with Mail and Calendar apps as both started to crash without any apparent...