I have recently installed Vista SP2 and now yesterday's IE8 update. Now IE8
is not only incredibly sluggish, it is also highly unstable. Even freezing
for 15/20 seconds or so before releasing itself and completing the job asked
of it half a minute earlier. Basically, it is simply unusable. I am now
using Firefox as my default browser.

The only IE8 solution, I think, is to completely uninstall it and start
again.

Can anyone give me reliable info on how I should go about this?

TIA

Ed