Windows Service Pack will not install on my Vista 32 bit desktop. I've downloaded and installed it several times (it shows successful installation and shows in update hisory), but does not show in installed updates. I've downloaded and run the update readiness tool and Vista 32 bit readiness tool from Microsoft, but still no go. I'm trying to get to IE 9. Do I need SP1 and SP2 to get IE 9? I reformatted this disc a couple of weeks ago, and everything looks great except for this hang up.