Here is a freeware tool called Re-Enable that lets you re-enable all such feature in just with a click.
Re-Enable will let you enable following Windows features:
Windows Registry, Command Line Tool, Windows Task Manager, System Restore, Config, Folder Options, Run command, My Computer, Task Scheduler, Right Click Context menu, Ms-Config (Xp only), Control Panel and Search.
Moreover, this tool also includes a tool menu where you can Scan, Edit, Delete Autorun.inf files, Repair Desktop icons, and reset files and folder attributes.
Re-Enable requires .NET framework 3. Download (for Windows 7, Vista and XP) Re-Enable