How enable Task manager / registry editor again?

Enable Task Manager Again

Step 1

Click Start, Run and type this command exactly as given below: (better - Copy and paste)

Step 2

Download and run this REG fix and double-click it.

Step 3

• Click Start, Run and type Regedit.exe
• Navigate to the following branch:

HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System

• In the right-pane, delete the value named DisableTaskMgr
• Close Regedit.exe

Step 4:  Using Group Policy Editor - for Windows XP Professional

• Click Start, Run, type gpedit.msc and click OK.
• Navigate to this branch:

User Configuration / Administrative Templates / System / Ctrl+Alt+Delete Options / Remove Task Manager

• Double-click the Remove Task Manager option.
• Set the policy to Not Configured.

Enable Registry Editor

Step 1 : Type gpedit.msc in RUN dialog box and goto:

    User Configuration -> Administrative Templates -> System

in right-side pane, set "Prevent access to Registry editing tools" to either Not Configured or Disabled.

Step 2 : Just type following in RUN dialog box and press :

    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f