Current problem reports

[MARGRETTA]

My browser is internet explorer.  I am running a xp operating system. But my browser address is coming back as mozilla.  I tryed changing it back ti IE  but it won't stay and converts back to non-micro soft browser.  the funny thing is that i can't locate any files on this mozilla browser.  I haven't downloaded anything and i am the only user of this computer.  I connect to the internet thru a DSL hub, road runner.  There is one  computer that is directly connected and this computerI know has mozilla as their browser.  why and how would this affect mine when I am supposed to be my own account and not on a network as it seems to show.  I have no permissions on a few different things that are runnning in my task manger.  I don't have a virus i have checked. Please help me if you can.  Thanks