One of the main problems that users of multi-user Windows XP systems experience is that the default internet browser is set as a system setting that is affecting all user accounts. If one user decided to change the default internet browser it would affect all user accounts of the Windows XP system.
Default Browser is a [...]
Windows XP: Default Internet Browser Per User Profile
Change The Default Web Browser In The System Tray
Windows does seem to have the habit of changing the default browser back to Internet Explorer from time to time. Many web browsers do also ask the user during installation if he wants to change the default browser. The difference between the default web browser and an installed browser is that the default browser is [...]

