*All XP systems must be on SP3 to process credit cards, all workstations must be SP3 only (cannot connect to other SP2 workstations), data file integrity issues make occur if you attempt to restore a backup made on SP2 on a SP3 system.
The minimum system requirements for Point of Sale Version 6 are:
Note: While Point of Sale will run on a 64 bit computer, it will only function reliably when installed on a 32 bit version of Windows.
If this solution does not resolve the issue, you can read discussions and post messages and questions relating to your issue on the QuickBooks Point of Sale Community Forum. You can also review other available QuickBooks Point of Sale support options for additional guidance.