Configuration Utility after installing POS for .NET driver does not boot with a desplayed XML error.
Configuration.xml file format storing setting information is broken for some reason.
Delete the broken xml file and boot Configuration Utility.
Configuration.xml file is stored in a below folder.
Windows XP
C:\Documents and Settings\All Users\Application Data\Microsoft\Point Of Service\Configuration\
Windows7
C:\ProgramData\Microsoft\Point Of Service\Configuration\
In order to boot it by user mode in Windows 7, the file is stored in:
C:\Users\[login user name]\AppData\Local\VirtualStore\ProgramData\Microsoft\PointOfService\Configuration
(Move to the administration folder and click "Compatibility Files" displayed on the menu to move the above path.)