on my work computer I have a Windows 7 that was installed using an ISO from the net (MS download was below 5kb/s) and a valid Technet serial number. The german language pack is installed as well.
It's supposed to be a Windows 7 professional 64bit, but if I run "sysver" I get this box: http://www.bilder-hochladen.net/files/cd23-1.png
It obviously says "Windows 7 professional" in the header, but in the text it's "Windows 7 Home Premium E" which is also the info shown in "Control Panel -> System". The startup screen says Windows 7 pro as well...
Now, which version am I using?!
My guess is that the language Pack is just playing tricks on me...
Anybody know a win7pro-only function I can try to run off the top of their head?