Quickbooks often crashes when the Web Connector receives requests.

Consider to condense your file.

Exploring the troubleshooting process will help us to address the crashes and slowness you're experiencing, Markus.

Before proceeding, it’s best to update your QuickBooks Desktop is to the latest release. This helps address compatibility issues, improves software performance, and ensures a backup copy of your company file.

Here's how to initiate the troubleshooting process:

1. Open QuickBooks Desktop.
2. From the No Company Open screen, select your company file.
3. Press and hold ALT on your keyboard and then select Open. Continue holding the ALT until the file opens. If QuickBooks asks you to sign in, release the ALT key and enter your password. Press and hold ALT again and select OK.

Proceed to Solutions 2 to 5 in this article if the issue occurs: Troubleshoot Unrecoverable Error XXXXX XXXXX.

If you encounter other unrecoverable errors in the future, please see this article for more information: Troubleshoot Unrecoverable Error in QuickBooks Desktop.

If you encounter other errors, don’t hesitate to consult the resources provided or reach out for additional assistance in QuickBooks Desktop.