registry unable to save permission changes windows 7

 problem solved by using psexec.exe to get system priviliges, and able to delete the keys. The command is: psexec.exe -i -d -s regedit.exe. download the software from below location.

 http://technet.microsoft.com/en-us/sysinternals/bb897553

copy pstools software to c drive.

 start cmd prompt in elevation mode .