Don't use shell extension. Uninstall extension (run PSPad as admin and use Proram settings / System) or use BAT file from PSPad support folder (run as admin)
Then run PSpad in normal mode (not as administrator) and in Program settings / PSpad choose Registry integration -- <http://forum.pspad.com/read.php?2,58025,58032> PSPad freeware editor http://www.pspad.com
