If Netscape is doing something it shouldn't, Clinton's suggestion to use Taskmanager to kill the program is probably the most direct, and simplest.

WinXP makes it reasonably easy to have multiple users on a machine, and you should be able to have the correct web/email account open when one or the other of you logs on as the appropriate user. Creating separate User Accounts can present a few "puzzles," and in some cases it's a sort-of PIA, since you must create an Administrator Account, and the Admin Acct must have a password if you create more than one user.

Individual user accounts can be given several "levels of authority," and in fact can all be made Administrators; but that's not really recommended.

Sometimes you may find that only the user who installed a program, or the Administrator of course, can make changes to program settings or load updates of the program. You may find that automatic updates of some kinds either require you to log on as Admin to get them, or they may download okay but require you to log on as Admin to install certain of them. (This is on the PIA list).

And logging off one user and logging another on is usually a little bit faster than rebooting, but often not by much.

If you're otherwise satisfied with the way you share your computer, try Clinton's "three-fingered-salute" and charge on. If you might want to separate the users via individual accounts, I'd suggest reading all the instructions first...

John