If you just want the OS info, you can run all sorts of commands from the command line:
WMIC has many :
WMIC OS Get Name
Microsoft Windows 7 Enterprise |C:\Windows|\Device\Harddisk0\Partition2
You can also use
wmic OS get /?
to get all your choices for that WMIC class.
systeminfo | Findstr /i "OS"
Will get you:
Host Name: MYCOMPUTERNAME OS Name:
Microsoft Windows 7 Enterprise OS Version: 6.1.7601
Service Pack 1 Build 7601 OS Manufacturer: Microsoft
Corporation OS Configuration: Member Workstation OS Build
Type: Multiprocessor Free BIOS Version: Dell
Inc. A08, 10/18/2011
: Microsoft Virtual WiFi Miniport Adapter
You can then either pipe this to text, or copy from the command line as I did above.
Another attempt to get the what appears to be service pack information:
wmic os get * /value > C:\WMICOS.txt
the search that file for the string you want.