product key for windows 7

Solution
And if Belarc Advisor doesn't do the job, try this elevated command line alternative.

cscript slmgr c:\windows\system32\slmgr.vbs -dli

To get to an elevated Command form, go to c:\windows\system32 and right click the file cmd.exe then select RunAs Administrator.
And if Belarc Advisor doesn't do the job, try this elevated command line alternative.

cscript slmgr c:\windows\system32\slmgr.vbs -dli

To get to an elevated Command form, go to c:\windows\system32 and right click the file cmd.exe then select RunAs Administrator.
 
Solution