Your computers have nothing to do with your SEN account.
I believe your XP problem is a network problem... you probably have it set up wrong or you should be using something like "obtain ip address automatically" and someone typed something in instead. If IE is locked... perhaps the owner of the computer wants you to use firefox.
Your WIN98 problem is solved by reinstalled and reupdating it. Win98 can break easily. Hopefully you are running the SE service pack. There's nothing wrong with the I in Iexplore.
IE is freaked anyways...
No one can get into your computer just by you visiting SEN.
This is getting stupid. Sorry, but please learn how to use a computer.
Locked.