More than once I have experienced that Everything 1.3.4.686 (x64) shows an empty result list no matter what I search for.
It also happened now.
Facts that I have checked are true:
This happens no matter what I search for.
The result is empty even if I turn off the option "Hide search results when the search is empty" and the search is empty (I search for nothing).
The C drive, which is the system drive, is activated for searching, included in the database, monitored for changes, using NTFS, and USN Journal is enabled for it.
The Everything service is running.
I am using the Everything service for searching.
Match path is on.
Match case is off.
Match whole word is off.
Match diacritics is off.
Enable regex is off.
Search | Everything is selected.
Restarting the service had no effect – still an empty result list no matter what I search for.
Finally, restarting the Everything user interface triggered a new scanning of the C drive, and only after that it worked.