Unknowingly i disable some options in gpedit.msc so it restrict many permissions eventhough it is logged in Administrative power it shows the message "This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator" .. so please help me
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And why not disable all those options again from "gpedit.msc"?
Open "gpedit.msc" again and look for all options having "Enabled" or "Disabled" value. If u find any such entry, just set its value to "Not Configured".