In a Tablet PC environment the pointer appears randomly in the upper left corner of the screen and a double-click is triggered.
It's a Twinhead T8 ruggedized Tablet running Windows XP Tablet edition. The mouse is pen-based Wacom type. We've been working on this a couple of weeks now. We've scanned for malware and replaced the pen a couple of times.
I've seen a couple of related posts (Q_21515752 and Q_21754730) but they get the standard "you're gear is sooo messed up, dude!" answer.
The strange pointer behavior occures when the pen is nowhere to be seen and the Tablet is idle. We've setup a corded standard mouse only configuration and everything works fine.
We're betting on a hardware malfunction or misconfiguration. If so, I'd like some help figuring out what kind of maintenance shoul we do.
The Tablet operates in a harsh environment: mounted on a fork lift inside a large warehouse. It gets DC power from the lift batteries. The Tablet normally uses a bluetooth based code scanner. It may also get some dust. It's winter now and the equipment has been under -2 °C (28 °F) lately.