请教一个蓝屏故障

  windows 的 video miniport drivers 是哪个文件啊? 这是一个 windows 2k 的系统, 在 VGA 和正常模式下都可以进入系统, 唯独不能进入安全模式.
用 windbg 载入 dump 文件分析结果如下:
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

VIDEO_DRIVER_INIT_FAILURE (b4)
The system was not able to go into graphics mode because no display drivers
were able to start.  This usually occurs if no video miniport drivers load
successfully.
Arguments:
Arg1: 00000000, Driver failure data.
Arg2: 00000000, Graphics device list.
Arg3: 00000000, Graphics device list data.
Arg4: 00050000, Possible cause of the bugcheck.

Debugging Details:
------------------


DEFAULT_BUCKET_ID:  INTEL_CPU_MICROCODE_ZERO

BUGCHECK_STR:  0xB4

PROCESS_NAME:  csrss.exe

LAST_CONTROL_TRANSFER:  from a007137c to a007c29e

STACK_TEXT:  
f40bfd38 a007137c f40bfd64 0015fd9c a007c6ae win32k!DrvDriverFailure+0x15
f40bfd48 a007c747 f40bfd64 80465014 817d1828 win32k!UserInitialize+0xa3
f40bfd50 80465014 817d1828 00000060 00000064 win32k!NtUserInitialize+0x99
f40bfd50 5ffcd203 817d1828 00000060 00000064 nt!KiSystemService+0xc4
0015fdb4 5ff833ff 00163e80 00162b8f 00162bab winsrv!NtUserInitialize+0xb
0015fe2c 5ff823ff 00162b88 00162b8f 00000003 CSRSRV!CsrLoadServerDll+0x1bf
0015ff78 5ff82035 0000000a 00162958 00000000 CSRSRV!CsrParseServerCommandLine+0x27f
0015ff94 5fff1107 0000000a 00162940 001629b8 CSRSRV!CsrServerInitialization+0x95
0015ffb4 5fff12bd 0000000a 00162940 0016296c csrss!main+0x4d
0015fff4 00000000 7ffdf000 000000c8 00000100 csrss!NtProcessStartup+0x18d


STACK_COMMAND:  kb

FOLLOWUP_IP:
win32k!DrvDriverFailure+15
a007c29e c3              ret

SYMBOL_STACK_INDEX:  0

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: win32k

IMAGE_NAME:  win32k.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4344ef76

SYMBOL_NAME:  win32k!DrvDriverFailure+15

FAILURE_BUCKET_ID:  0xB4_win32k!DrvDriverFailure+15

BUCKET_ID:  0xB4_win32k!DrvDriverFailure+15

Followup: MachineOwner

video miniport drivers vga.sys