Bug: ArcMap Tools toolbar is checked on but not visible
ArcMap Tools toolbar is checked on but is not visible. Checking it off and on again does not make it visible. Deleting Normal.mxt and HKEY_CURRENT_USER\Software\ESRI does not make it visible.
The ArcMap Tools toolbar may be hidden behind Windows Start menu bar. This can happen if the Start menu bar is located on the right-hand side of the Windows display.
Notice in the following screenshot that only a small portion of the ArcMap Tools toolbar is visible:
Resize the Start menu bar, grab the ArcMap Tools toolbar and dock it within ArcMap.