:D ! .. indeed ! ;)
That bios flash though seems a mystery .. if this wasn't a 4400bx board (as now seems the case when we eventually got around to checking ;)) then how did it manage to apply the bios update for a board that it isn't ? - My guess is despite what it may or mayn't have said the 'flash' didn't get done, else the motherboard would be very, very unlikely, to be still working ..
Anyway whichever one of the three we have, you want the Hyperion 4-in-1's (they are for VIA chipsets, all of these seem to be anyway) you can find that
here @ ViaArena or there's another version posted on MSI's site
here .. that should get rid of 1 yellow ! (on 'PCI System Management BUS' )then we might finally be able to try & fix the sound up !