I've freshly installed Windows 7 final on a Fujitsu Siemens Esprimo Mobile V5505. It is all installed with default drivers, since Fujitsu Siemens has yet not offered any Win7 drivers.
Problem is, roundabout every 4th time I start the notebook, the touchpad does not work. These times, in the event log will be two events from the source i8042prt, one error (EventID 22) stating "could not set the mouse sample rate" followed by one warning (EventID 18) "The device sent an incorrect response(s) following a mouse reset.".
After a reboot the system usually works like charm.
Any ideas what might cause these glitches? There is no external hardware attached, I can't see any pattern what might cause this.