Follow the procedure below to uninstall ArcInfo Workstation 7.2.1.
The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary.
Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.
Select Start > Programs > ESRI License Manager > Shut Down License Manager to shut down the license manager.
Select Start > Control Panel > Add/Remove Programs and uninstall all of the Arc/Info 7.2.1 entries removing the ARC/INFO 7.2.1 Core ARC/INFO entry last.
Uninstall the license manager entry.
If steps 1-3 do not work properly, continue on to the next step anyway.
Open Windows NT Explorer and browse to the drive that contains your installation of ArcInfo 7.2.1.
Delete the arcexe72 folder.
Delete the Flexlm folder.
Browse to C:\Program Files and delete the ESRI folder.
Go to Start > Run and issue the command regedit. This opens the registry.