A cool way my boss thought of to let a user know what their computer name is by editing the ToolTip (in the registry called the InfoTip) to %USERNAME% on %COMPUTERNAME%
Like below

**************************

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}]
@="My Computer"
"InfoTip"=hex(2):25,00,55,00,53,00,45,00,52,00,4e,00,41,00,4d,00,45,00,25,00,\
20,00,6f,00,6e,00,20,00,25,00,43,00,4f,00,4d,00,50,00,55,00,54,00,45,00,52,\
00,4e,00,41,00,4d,00,45,00,25,00,00,00