Yup, if the native search box (bottom left) is only giving you a blank black box when searching it's not you, Microsoft screwed up with the last update.
Update: Windows 10's search is broken. Here are some workarounds
Trying to use Windows 10’s native search tool results in an empty, unresponsive black box, rather than the expected list of results. Rebooting doesn’t help. It appears something’s broken on Microsoft’s end.
Update: Windows 10's search is broken. Here are some workarounds
