Click Start, click Run, type regedit, and then click Continue.
Expand HKEY_LOCAL_MACHINE, expand SOFTWARE, expand Microsoft, expand Windows, expand CurrentVersion, and then expand Policies.
Right-click Policies, select New, select Key, and then type Windows as the file name.
Right-click Windows, select New, select Key, and then type Sidebar as the file name.
Right-click Sidebar, select New, select DWORD (32-bit) Value, and the type TurnOffSidebar as the Name.
Right-click TurnOffSidebar, and then set Value data: to 1.
You must log off your system or close the sidebar.exe process after you apply this procedure.