Question : NVIDIA drivers won't drivers update?

I have Vista32, and a 9600GSO card.  I updated divers and NVIDIA desktop software several times up to version 197.45(8.17.11.9745)  The latest drivers, 15.01 show as available in the NVIDIA control panel, as well as the 257.21 package, so I download them.  I run the installer as usual, it completes and I restart.  I check the driver version and it remains at 192.45.  I tried starting in safe mode and uninstalling the driver and reinstalling the new one and it goes through a successful install with restarts and everything, but the driver still shows as 192.45.
Is 15.01 was released in 2007.. And the control panel says that 256.21 is available, and that I do not have the latest drivers
I check settings through NVIDIA control panel version 2.7.170.15
How do I update in this case?
Thanks.

Answer : NVIDIA drivers won't drivers update?

Well,
if you have things working, you can do one of two thigns:

1- generally, once a tested driver works, it is left untouched until a reason (security or a failing app or such) causes an upgrade.  Bottom line :"if it ain't broken, don't fix it"

2- now that you 'know' what works.  Create a restore point.  Try the upgrade and see if you remain stable.  IF you do, then you'll be good to go.  If the instability returns, return to restore point.  Try again in a few weeks or such after watching the forums and such to see if others report a similar problem, or you notice a report that the problem you were having has been 'fixed' in the latest release.

Up to you, I'd like to think I'd leave it alone (but knowing me, I probably would try to get it current).  My spouse's box, I'd leave alone...mine I'd keep tinkering with.  FWIW