I'd do the upgrade. It's pretty easy to do, you just run Windows Update and let it do the install. IE9 by itself can 30 min. to maybe an hour, but it's all automatic. There're two good other browsers you can use that you can use, Firefox which can be downloaded from http://www.mozilla.org and Chrome that you can download from http://www.google.com/chrome .
I notice a bar at the top of my screen telling me I need to upgrade my IE 7, plus some of the websites I visit aren't working anymore and I'm wondering if it's because I'm using an old browser version of IE. How difficult is it to upgrade? I'm just afraid that I'll have new problems if I upgrade it. I'm using Windows Vista. 64 bit Thanks in advance for any advice & help.