Event ID 1000 Application Error is caused due to several reasons. It could be due to a malware/virus, an application that is crashing, or an issue with Windows 10. This error can be viewed in the Event Viewer and the event leading to it can be traced.

Since the error is caused due to multiple reasons, we must understand various fixes.

Uninstall/Reinstall Application

If you can trace and narrow it down to the specific application which causes the error, it can easily be rectified.

Open the Control Panel and click on ‘Uninstall a program’ under the Programs section.

Select the application causing the error and then click on ‘Uninstall’.

After completing the uninstall, reboot your system.

Clean Boot the System

When you clean boot the system, it only runs the necessary drivers and software and disables the other applications.

Search for System Configuration in the Start Menu and open it.

In the System Configuration, untick the ‘Load startup items’ checkbox and click on the ‘Services’ tab.

Tick the ‘Hide all Microsoft services’ checkbox and click on ‘Disable all’ at the right .

After making the necessary changes, click on OK and then reboot your system. If you still see this error in the logs, try running the SFC scan.

System File Check(SFC) Scan

Search for ‘Command Prompt’ in the Start Menu. Right-click on it and select ‘Run as administrator’.

Execute the following command in Command Prompt.

sfc/scannow

The system will run a scan to detect corrupt files and come up with the result in a couple of minutes. After the scan is complete, execute the following command to fix the error.

DISM /Online /Cleanup-Image /RestoreHealth

The three solutions discussed will most likely fix the error but you must first trace and comprehend the problem leading to it.