Steps to completely uninstall and then reinstall QuickBooks Point of Sale for Desktop to troubleshoot and resolve data file and program issues.
Ensure the following before uninstalling QuickBooks Point of Sale for Desktop:
If uninstalling in the server computer (or the computer where the POS data file is locally saved):
Note: If you were unable to make a backup, restore the qbpos.db file located in the data folder pasted in your desktop.
If you like to remove the data folder from the desktop, move it to another folder such as Public Documents or Shared Documents but do not delete it.