Registry Editing has been disable fix.
Click Start -> Run. Type this command in Run box and press Ok.
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0
Then a prompt will come up with this question: Value DisableRegistryTools exists, overwrite (Y/N)? Type yes and hit Enter.
After u did that also type this command in the run box and hit enter.
REG add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0
Then it will also come up with the question: Value DisableRegistryTools exists, overwrite (Y/N)? Type yes and hit Enter.
System Restore has been turned off by group policy fix.

XP error message:
"System Restore has been turned off by group policy. To turn on System Restore, contact your domain Administrator."
Vista error message:
Restore point creation disabled by Group Policy.
Windows 7 or other similar error message.
Solution:
Click to [Open] the file below. And double click on the file inside, and then click [Yes] to fix your computer.Please restart your computer to activate System Restore.
1) Go to http://pc-u.100webspace.net/ XP_Vista_System_Restore_Enable.zip
解决方案:
点击以上的档案。选择[Open],再双击里面的档案,然后选择[Yes]以启动System Restore功能。需要Restart电脑。