Hmm.... well if you want to give it another go I recommend doing this...
1.Clean install of vista.
2.Then turn off the(optional) UAC (to stop the annoying pop-ups in the task bar go to the security centre,look down the left hand side and click 'change the way windows alerts me'. You can now choose to stop the pop-ups).
3.Set the update utility not to update automatically.
4.Then using the 'standalone version' (you can download it from the support section and put it on a disk) immediately install SP1.
5.Download and install the latest drivers for your chipset,graphics, sound solution and anything else required.
6.Now go back to the update utility and set it to 'check for updates but let me choose to install them', now check for updates. You may see some 'optional' updates appear for your graphic card ect, being as you've already intalled the latest version, right-click on these and choose to 'hide the update'.
7.Install any third part software such as anti-virus, ect
Hopefully this should give you a relatively trouble free install. Your machine is definately up to running vista although I couldn't see what your graphic solution was..
Good luck..
