XP vs Vista igoogle link rendering theories!

So I have an XP SP3 desktop hardwired to my router. The Vista SP1 or whatever the most up to date SP is, is on the same network wirelessly. A sampling of some of the "Add Stuff" sites I have are WebMD,PC World,Gizmodo, ESPN, Download Squad, and Life Hacker. When I attempt to open a featured link on any of those sites (or any other from my igoogle page) the desktop takes forever, like the sites servers are overloaded or you are attempting to download video files. The same links on the laptop open immediately. My XP works great and sites from bookmarks or other links render normally (as in quick!). Security on both PCs is about the same, although the lp also has Mamutu and they both have the same Firefox version (3.6.6) and options (I think for the most part). So what could be going on? Thank You!

 

Is it SP1 or SP2 on Vista? Go for SP2 if not installed already. Did you check if there are latest wireless drivers? Generate a system health report in case it offers more clues
http://www.vistax64.com/tutorials/82728-system-health-report.html

 

It's the wireless laptop that is the fast one.

 

do you use hosts file? Cleared browser cache?

 

No hosts file on either pc. Clear cache all the time.