Thanks. I've already gone that route and whilst it appears that the chipset has been updated, the next time I boot into whatever is my "system of the day" tests show that nothing has changed.
Yes this MOBO is getting on in age now but performs very well, in Windows 7 and Vista for that matter. Bought this machine in 2001 and it has been heavily modded since then....LOL.
As I stated last night, Nvidia's Forums are full of moans and groans from people experiencing exactly the same as myself, and not just for this update, but the previous one too, (181.20 I think). With many complaints from people with much more recent MOBO's than myself.
At least the damn things installed OK in both my XP boots...whoop dee doo.