All the differing ways to ascertain the driver info has always said I have the 630a but anyway the driver version I had when I got the computer was 182.24 from which I changed to 182.50 which made no difference.
I hope I have not mislead on a point. I joined this forum when I had my old computer using XP Home and have been remiss in not informing that with this new computer I am using XP Pro (altho NVIDIA never queried me on this). This has just come to mind as I checked your suggested download which says it is for OS XP and XP Media Center. Does this make any difference do you think? Perusing the NVIDIA website on their driver downloads the drop down menu for the OS' does not mention XP Pro nor Media Center come to that just XP and XP 64 bit - rather confusing.
Please forgive me if you think I am being a bit pernickety but downloading any new drivers seems to me rather stabbing in the dark without a reasoned explanation for the glitch. If it were so simple I would have thought NVIDIA would know about it.
That the NVIDIA resolution mode is 'overwritten' on start or restart should indicate a cause. Another thing I've noticed - when going thru the Windows resolution change procedure, clicking on 'Apply' returns the res. slider to 1200x800 WITHOUT the screen blacking out and returning with the new res. as it does black out when going thru the NVIDIA' icon res. change which retains the change. That this new change goes back to 1200x800 on Start/Restart must show something - what about a registry item which is doing this?
If you are getting fed up with this I quite understand - you have been very assiduous I must admit.