A lot of recent Microsoft "upgrades" have been on the shitty side. Excel was a bit shitty already, but 2008 is very shitty. I imagine that IE 8 will probably require that you use 3 separate sessions each time you want to type a URL, and then you'll have to log in as admin before you're actually allowed to visit that URL you just typed. Then you'll have to approve each and every HTML tag on the page as it loads.

This new security initiative is known as the Dynamic Integrated Administration for Local User Protection - note that this may result in the false perception that one's internet connection is slow. Also, starting with Windows Avanté, there will be a new file system, the Finite Linked Object Protection/Private Interface Execution system, which will use an advanced magnetic drive to ensure that sensitive files do not last long enough for criminals (or anyone else) to use them after a couple of days.