Starting ArcPad 7.1 may result in the following ArcPad warning message:
"C:\Program Files\ArcPad 7.0\System\PrjData.dll not found.
Projection and datum transforms may not operate correctly".
The uninstallation process does not remove 7.0.1 version of ArcPadPrefs.apx from My Documents on Desktop PC installations. Thus, ArcPad still searches for System folder in C:\Program Files\ArcPad 7.0\System path.