Installing SAPGUI 7.10 on vista sp1 through network does not register files

I am trying to install sapgui 71.0 patch level 7 on a vista sp1 machine, using network sap distribution service

. But the ocs and dll files won't register.

In the sap installation errorlog there are -2147024893 messages for all ocx en dll files.

When I look in the windows log files there is a sidebyside message (translated from dutch):

Can not make activationcontext for 'C:\Program Files\SAP\FrontEnd\SAPgui\sapshlib.dll' . Can not find dependend assembly Microsoft.VC80.MFC,processorArchitecture="x86",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="8.0.50727.762" .

Manualy installing these files as an local administrator gives the same error results.

So I think there is a problem with C++ libraries deployement.

I have tested this on several Vista SP1 pc's with the same error result.

Any ideas how to resolve this?