If you are using Windows Vista Ultimate or Business editions the follow
this steps:-



- Right click on *My Computer* and then click on *Manage*.


- Now Double click *Users and Groups* and then click on *Groups*.


- Then right click on *Administrators* Option.


- Click on *Add to group* and then click on *Add*,then on *Advanced
Option* and Click on *Find Now*.


- Click *OK*.


- Over here you will see *NT Authority\Local Service*in the list ,
Click on *OK*.


- Finally close Computer Management and reboot your PC.


If the above mention things don't work for you check out the below
links

http://forums.techarena.in/video-games/1154457.htm
http://forums.techarena.in/windows-v...es/1071390.htm
http://forums.techarena.in/operating...ms/1064737.htm
http://forums.techarena.in/vista-help/1038554.htm


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