AC97 drivers on onstallation disk

this will be happened only in case 2nd stage install drivers from ISO with \modules\optional\ALC*.*
(AC97 drivers)

Entered debugger on last-chance exception (Exception Code: 0xc0000005) (Page Fault)
Memory at 0x00000000 could not be read: Page not present.

• • • Fatal System Error: 0x0000001e
      (0xC0000005,0xF711F491,0xF734F85C,0x00000000)