[2FastSS4U]

I actually had to uninstall firefox recently as it caused any and all browsing to lag at least 15 seconds before it would recognize I input anything (I.E. search or toolbar) But I also downloaded spybot search & destroy and it found nearly 500 bad things on my computer. These two operations pretty much saved me a headache's worth of hassle. Hope this helps. Oh, and the ne IE7 isn't too bad, it actually uses the tabs and everything just like firefox, if that's what you were concerned about losing from that browser.