To Enable Task Manager,regedit,folder options

To Enable Task Manager

Click Start then Run.
Enter gpedit.msc at the command line and click OK. This will open the Group Policy settings window
Select User Configuration | Administrative Templates | System | Ctrl+Alt+Delete Options | Remove Task Manager.
Double-click the Remove Task Manager option from the Group Policy menu. You can then disable, enable, or set the policy to Not Configured. Remember: Since the policy in question is called Remove Task Manager, by disabling the policy, you are actually enabling the Task Manager.

To Enable Registry Editing
Click Start, Run and type GPEDIT.MSC to launch the Group Policy Editor, Now goto User Configuration \ Administrative Templates \ System and set the policy (Prevent access to registry editiing tool) to Not Configured

To enable Folder options
Go to Run –>gpedit.msc
User Configuration –> Administrative Templates –> Windows Components –> Windows Explorer
Enable and then Disable “Removes Folder Options menu from Tools menu“