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Error - Application Cannot Be Started
Error - Application Cannot Be Started
Troubleshooting the error: " Application cannot be started."
Updated over a week ago

Some QuickBooks Desktop users may be prompted with a message β€œApplication cannot be started. Contact the application vendor.” See image below.

Solution 1 - Rename Windows local/apps/2.0 folder

1. Completely shut down the Sync Engine.

2. In Windows, navigate to the folder:


Note: In the folder address, username will appear as the name of the Windows user (as in our example below).

3. Rename the 2.0 folder (choose a name that makes sense for you).

4. Run the Method Sync Engine. This will recreate the folder you renamed above.

At this point, the sync engine should run properly.

Solution 2 - Disable / Re-enable antivirus

If Solution 1 does not work for you, your antivirus program may be conflicting with the sync engine.

2. Disable your antivirus program.

3. Turn off the Windows Defender Firewall.

Control Panel -> System & Security -> Windows Defender Firewall -> Turn Windows Defender Firewall on or off.

5. Re-enable your antivirus program.

At this point, the sync engine should run properly.

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