Can't install XnShellex!

[RStolpe]

Hello,

I am unable to install XNShellex.exe on my desktop. There is always the error message:

Unable to register the DLL/OCX: DllRegisterServer failed; code 0x80070005

Same message when i try to install the ZIP version.
This appears also when explorer and all other programs have been closed.

Installation on my Notebook works fine! (Both computers run WIN XP Prof).

Please help!

Reinhard.