Another Instance of Application Is Already Running – Six Methods

Resolving annoying "One other application instance is running" error! Many users encounter an error message "Another application instance is running" when starting a specific software, which cannot be resolved even if it restarts multiple times. This article provides a variety of effective ways to help you get rid of this problem.

Many users reported that they encountered this error while using Messenger. Although this problem may occur on other platforms, there have been many complaints about this error recently with the message "Another Messenger instance is running. Two Messenger instances cannot be run".

If you are a Messenger user, try starting the Messenger application from the system tray and closing another instance first, which may be caused by an update error. If this method does not work, try the following method.

Method 1: Restart the computer

The application may have a malfunction or error. If it still fails to restart, try restarting the computer. Then check if the application still displays the "One other application instance is running" error.

Method 2: End the software process through the task manager

Because the application is running in the background, the "One instance is running" error message is repeated. You can open Task Manager to check, end the process, and then try to restart.

Step 1: Press Win X to open the Quick Menu and click Task Manager .

Step 2: View the running process, find the application's process and select End task .

Method 3: Check application and system updates

Is your app the latest version? Regular updates are important whether it is software or system, and can fix existing bugs and add improved features. If you ignore updates for a long time, update immediately and try running the application again.

To update the application, you can visit the official website to download the latest version. Alternatively, the application itself may provide the ability to check for updates.

To update the system, follow these steps:

Step 1: Press Win I to open settings , and then click Update and Security .

Step 2: Click Windows Update > Check for Updates to download and install available updates.

Wait for the check to complete, and then click Restart to complete the update.

Method 4: Run SFC and DISM scans

Another way is to fix system file corruption. You can use SFC and DISM scans in turn for thorough inspection and repair.

Step 1: Enter a command prompt in the search and run as an administrator.

Step 2: Enter the command – sfc /scannow and press Enter to execute the command.

If this command fails, you can try scanning with DISM – DISM /Online /Cleanup-Image /RestoreHealth .

Method 5: Perform a clean startup

To avoid third-party software interference, you can run a clean boot to start Windows with minimal drivers and startup programs.

Step 1: Enter msconfig in the search and open the system configuration .

Step 2: In the Services tab, select Hide all Microsoft services , and then click Disable All > Apps .

Step 3: In the Startup tab, click Open Task Manager and disable the unwanted startup service.

Now you can check if the "One other application instance is running" error still exists.

Method 6: Reinstall the problematic application

If none of the above methods resolve the "One instance is running" issue that occurs when starting a specific application, you can reinstall this problematic application.

Step 1: Go to Start > Settings > Apps > Apps and Features .

Step 2: Scroll down to find the problematic application and click Uninstall > Uninstall .

Summarize

How to fix the "One other application instance is running" error? This article provides several effective methods. You can try one by one, some of these methods may solve your problem.

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