|"all the computer info is list in this mornings post"|
No it's not. Here's your motherboard:
You didn't list your CPU but I suspect it's an AMD Athlon 64 3200+. Your RAM should be DDR400 but you didn't say. I'm guessing you have 512MB RAM & 128MB of it is used by the weak onboard graphics? And you didn't address my comment about crappy startup apps running in the background. You may have some program running that's interferring with the sound.
Anyhow, the onboard sound chip is the Realtek ALC658C & the link to the drivers is in my other response.
"If I uninstall the onboard sound driver nothing works"
You have to make a choice - which sound do you want to use? I gave you 2 suggestions: disable the onboard sound in the BIOS, then use the Soundblaster card. Or remove the Soundblaster card & use the onboard sound.