Hello CallumLong,
Vista uses this Software Licensing Service to check itself and confirm it is Genuine. When the servise is stopped, Vista is unable to confirm it's own Genuine status and assumes something (or someone) has tampered the Software Licensing Service and flages itself as Non-Genuine.
The below are the Manual steps for Force Start the Service. Once you type the "net start slsvc" command and hit Enter, if you receive any error, then, for some reason, Vista is not processing the command correctly and the issue is larger then just a Software Licensing problem. In which case, I would suggest contacting Vista core support at http://support.microsoft.com
If you have acces to the Start button:
1) Click the Start button
2) Type: cmd in the Start Search field
3) At the top the Start window, you will see cmd.exe
4) Right Click cmd.exe and select Run as Administrator
5) Type: net start slsvc
If you do not have access to the Start button:
1) Click the option Access that launches an Internet Browser
2) A Browser will open, type: %windir%\system32 into the address field
3) Find the file cmd.exe
4) Right Click on the cmd.exe and select Run as Administrator
5) Type: net start slsvc
Thank you,
Darin Smith
WGA Forum Manager
