.\src\main.c(362): _main_close_existing_process(): Fatal error: Timed out while waiting for Everything.exe to close

[void]

Issue

When installing Everything you receive the following message:

.\src\main.c(362): _main_close_existing_process(): Fatal error:
Timed out while waiting for Everything.exe to close

Cause

Everything is currently running in the background and is busy.

Solution

Terminate the running Everything process and reinstall:

• Open the Task Manager with Ctrl + Shift + ESC.
• Click the Processes tab (or Details tab on Windows 8+)
• Select Everything.exe and click End Process.
• Click End Process.
• Reinstall Everything.

[void]

Everything does attempt to terminate the process. However I've just noticed it does not have the correct access to do so.
I've added this to my Things to fix list.