From
http://ts.veranoest.net/ts_faq_licensing.htm.
Q: How can I delete the MSLicensing key from a thin client?
A: WinCE thin clients store the MSLicensing key in the default location in the registry:
HKEY_LOCAL_MACHINE\Softwar
e\Microsof
t\MSLicens
ing
The problem is often how to access it.
Thin clients should have an option on the setup screen to delete this key.
If your thin client does not have this option, reinstall the CE firmware, or reset the client to the factory defaults.
Make sure that you write down your custom settings before doing so!
If the thin client does not run Windows CE or does not have any tools available, reinstalling its firmware will probably achieve what you want. The vendor may be able to provide more help.
Note also if the thin client runs Windows XPe, the registry location above does apply and deleting it will do the trick.
Cláudio Rodrigues
Citrix CTP