I've been having problems connecting my Creative Zen Microphoto player to my
system after some major updates were installed. On Monday, after a rollback
to before the updates, one update was installed, KB902400. After reboot, the
connection problem came back. I uninstalled KB902400 and connectivity was
restored.
Even so, there still seems to be some residual problems. The Event Viewer
still shows a boot-time error: "The executable program that this service is
configured to run in does not implement the service. " for the Portable Media
Device Serial Number service. And a warning when the player is
connected

WPDMPT Driver) "MTP Protocol Driver has detected that the device
'Creative Technology Ltd, Creative Zen MicroPhoto, 1.30.04_0.00.65' cannot
accept read-only properties when creating new objects ((15))." However, the
connection does not seem to be affected by the errors.