As soon as I got a windows PC and internet I downloaded Netscape..
I eventually graduated to Mozilla, then to Firefox..
I have never looked back..
The only way I would use IE7 or any other MS browser is if absolutely nothing else was available..
My brother uses IE(6?)/Outlook , and AdAware finds major "bugs" after every use..
I can use Firefox all day/week long and not get the bug alerts he gets with one internet session..
My rule:
Always do Adware/Spyware/Virus scans after EVERY use of IE / Outlook.