If QuickBooks Desktop runs slow after a new update, first try restarting
your computer to clear any temporary issues. Next, ensure your
QuickBooks is up-to-date with the latest patches by going to Help >
Update QuickBooks Desktop. Perform a Verify an...
To repair a damaged QuickBooks company file with accessibility issues,
start by running the QuickBooks File Doctor tool. Download and install
it from Intuit’s website, then open it and select your company file to
diagnose and fix errors. If problems ...
If QuickBooks cannot communicate with the company file, first ensure the
file is in the correct location and accessible. Check network
connectivity if using multi-user mode and verify that hosting settings
are correct. Run the QuickBooks File Doctor ...
Common causes of QuickBooks crashing when opening a company file include
data corruption within the company file, incomplete or faulty QuickBooks
installation, outdated software versions, or insufficient system
resources. Network issues, especially i...