Troubleshooting
Clean Up QuickBooks POS Data Before You Migrate: Merge Duplicates and Run Verify Data
Merge duplicate items and customers, then check the company file for damage, so you do not carry a mess into your next system.
QuickBooks POS Error 193: 'Primary Key for Dept Keywords Is Not Unique'
The multi-store mailbag error that stops Headquarters and remote stores syncing, what causes it, and three fixes from updating to rebuilding the remote file.
QuickBooks POS 'Failed to Open Company': Restore a Backup or Rename the File
A damaged company file is the usual cause. Open it from a test company, restore a backup, or rename the file, with screenshots of each step.
QuickBooks POS Won't Start After a Windows Update (KB3194496)
POS worked yesterday and loops on the database form today. How to find and remove the Windows update behind it, and how to stop it coming back without leaving the PC unpatched.
QuickBooks POS Won't Open Your Company Database: 3 Fixes in Order
When Point of Sale refuses to open your company, work through these three fixes in order: service settings, a renamed data folder, then the update or service that broke it.
QuickBooks POS Error 121 'Permission Denied': How to Fix It
A regular user gets Error 121 while the admin signs in fine. Clearing the stale licensing and activity files usually fixes it, and here is how to do it safely.