I installed a machine with Vista Ultimate 64 Bit Service Pack One edition at the weekend.
On my fibre connection to a Q9550 machine it took nearly 12 hours all in to get it fully patched up, as an OS I don't have an issue with Vista, but the update system for it is seriously fubarred
Generally speaking, the problem isn't really Vista, it'll be the install of Vista from the manufacturer. A fresh install from a clean Vista image will be many many times better than any manufacturer set up OS.
Every laptop I've owned, I've re-installed a stock OS on to it straight away because the manufacturer one is nearly always bad in some way.
You do know there is a Vista SP2...
Why not download the latest full service pack and install that manually after the install of windows?
Once that's in, there won't be many other updates to stick on.
Microsoft have gotten a grip, you're installing something 5 years old so it needs a bucket load of patches to make it even vaguely secure. Try patching Windows 7, never had a hitch with it but like every OS there are always updates which is why people tend to slipstream them into the install disks.
To be fair, at least you're actually getting updates. Ubuntu and OSX releases from the same time period are long dead and buried.
Sitting and watching an RTM version of Vista grind away on a slow laptop drive installing years and years worth of updates is going to drive anybody nuts. Just do what the rest of us do and go do something else.
And, like I mentioned before, if that's the original drive it would not surprise me in the slightest if that disk wasnt 100% healthy, or even the RAM - have you run memtest?
To be fair, at least you're actually getting updates. Ubuntu and OSX releases from the same time period are long dead and buried.