Installation WEB Client 6.51 SP0 "Error with writing in file: IPH_WatchDog.dll"

Installation WEB Client 6.51 SP0 "Error with writing in file: IPH_WatchDog.dll"

Hello!
I am trying to install ZenOn WebClient 6.51 SP0 on a Windows XP SP2 PC logged in as administrator user.
Unfortunately the Installation hangs up at about 85% while trying to "copy new data"
Getting following error messages:
"Fehler beim schreiben in Datei: IPH_WatchDog.dll
œberprüfen Sie, ob Sie auf den Ordner zugreifen können."
-> Error with writing in file: IPH_WatchDog.dll. Check if you have permission to access the directory.
"FDI server error."
Any ideas?
Thanks!

This is a migrated post! Originally posted on 30.07.2015 by user kicker. Please be aware that information can be outdated.