Please help me out of my fix.

hi Sami, i am with you after a long absence, however felt pleased to see you
fine and kicking,with many visiable and eye catching changes. keep it up. i wish you all success.
Now coming to the point, and that is that, my Internet explorer was not working when i installed my XP SP-2 WINDOW, prior to rectifying this problem, i installed Mozilla Firefox, since then on my last three attempts my system hangsup (stops) when i try to download IE-7, from Microsoft.is it mozilla,if so , and i uninstall it, then how and through whome i will download IE-7. PLEASE LET ME KNOW THE REASON OF THIS PROBLEM, AND ITS BEST AND QUICK SOLUTATION. THANK YOU, AWAITING.