And just to add to Dan's comment....
ArcGIS Desktop Advanced if the "ArcInfo" level, so although you don't need Workstation installed to use the Desktop Erase tools, you still need to be licensed at that level.
If you are not, but still have an ArcInfo workstation license that works (maybe older version that is out of maintenance but still legal otherwise), it is still possible to get Workstation up and running on even the newer operating systems, although some things may not work properly. just an fyi.