This is more of a 411-esque post... not sure if anyone has posted about this here yet.

Nevertheless, there is a bug in Windows 10, that causes Explorer to act up due to "resource exhaustion," at least that's what the current consensus is and it seems to happen as a result of moving large amounts of files from the OS drive to other drives, at least as far as I understand it... I'm not exactly sure what resource exhaustion is...

I've ran into the bug as well moving the large extracted folder for 3D Studio Max 2015 installation from the OS drive to my data HDD...

The bug results in glitching context menus and other UI problems regarding Explorer.exe ... restarting Explorer.exe doesn't seem to fix the problem for long, but a restart seems to rectify this issue for now... someone from Microsoft on the Microsoft support forums said that if someone running the latest beta build of Windows 10 (10532), let Microsoft know and they will explore the issue and try to fix it.

It also affects the UI in File Explorer as well, but most seem to notice via context menus first.

Examples: