Windows vista, home premium, 32 bit op system, Service pack 2. a6200n is the model number, it is a hewlett packard. AMD Athlon 64 X2 Dual core processor 5000+  2.60 GHz.    There is 6 gigs of ram in the motherboard. I have an NVIDIA GeForce GTX 260 squeezed in onto the pci express slot (graphics card).  And i am using an antec 900 COMPUTER case OPPOSED to the original case. There are cooling modications, but other than that there are no other major modifications.                                  When I attempt to make changes using F10, and entering setup, prior to the computer booting, I am allowed to make and save the changes. But when i reenter setup on next restart or attempt to distern if the changes are in effect after the computer has booted, EVERYTHING is back to default as before. I can make no changes at all and am wondering if there is something i can do about it. I know how to save changes rather than just exit and discard the changes.Replace the CMOS battery. There is a small battery on your motherboard that's about the size of a nickel - part number CR2032. You can buy these batteries just about anywhere, Wal-mart or your LOCAL drugstore should have them.


Make sure that you're grounded to the case the whole time you're working - static electricity can fry your motherboard!