When you install an old version of Quicken on a new PC, Quicken wants to register itself and make online services available. It can’t actually complete the registration so it gives up and asks for permission to retry every time you open Quicken.
To disable this you need to execute a hidden command, hold down Ctrl+Shift while selecting the One Step Update menu item. Quicken responds with a dialog that says “You will no longer be prompted for registration.”. The One Step Update menu item is located in the Finance menu for Quicken 2001-2002 and in the Online menu for Quicken 2003-2005.
I found this information here.