The Windows Vista boot screen has 2 options
1 is the green bar (similar to the XP blue bar) and the other is just a fancy thingie that doesn't really show anything is happening
To see this other option, hold down the Windows Key and push R, this will bring up the Run box.
In here, type
msconfig and hit Enter.
Goto the
Boot tab, and check the opiton
No Gui boot
Restart, and you've got something different.
In regards to your sound on startup...the best advice i can give you is update your drivers...