[ipxe-devel] WinPE 5.0 wimboot errors?

[Andrew Bobulsky]

On Oct 10, 2013, at 5:48 PM, Brian Rak <brak at gameservers.com> wrote:

> I'm attempting to boot a WinPE 5.0 image (from the ADK for Windows 8.1 preview: http://www.microsoft.com/en-us/download/details.aspx?id=39306 ), and I'm running into some issues.  It seems that wimboot is no longer able to load bootmgr.exe:
>
> https://dl.dropboxusercontent.com/u/2078961/wimboot.png
>
> If I compare the old wimboot file (from WinPE 4.0) to the new one, what I'm assuming to bootmgr.exe seems to be in the same place:
>
> 00006880  53 20 20 20 25 78 0a 00  4c 64 74 20 20 25 78 0a  |S %x..Ldt  %x.|
> 00006890  00 00 00 00 00 00 00 07  25 6c 78 0a 00 00 00 00 |........%lx.....|
> 000068a0  42 4d 58 48 1c f6 05 00  08 a3 0a 00 10 20 00 00 |BMXH......... ..|
> 000068b0  4d 5a 90 00 03 00 00 00  04 00 00 00 ff ff 00 00 |MZ..............|
> 000068c0  b8 00 00 00 00 00 00 00  40 00 00 00 00 00 00 00 |........ at .......|
> 000068d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 |................|
> 000068e0  00 00 00 00 00 00 00 00  00 00 00 00 e8 00 00 00 |................|
> 000068f0  0e 1f ba 0e 00 b4 09 cd  21 b8 01 4c cd 21 54 68 |........!..L.!Th|
> 00006900  69 73 20 70 72 6f 67 72  61 6d 20 63 61 6e 6e 6f  |is program canno|
> 00006910  74 20 62 65 20 72 75 6e  20 69 6e 20 44 4f 53 20  |t be run in DOS |
> 00006920  6d 6f 64 65 2e 0d 0d 0a  24 00 00 00 00 00 00 00 |mode....$.......|
>
>
> I'm not certain what the error messages mean, has the bootmgr format changed significantly?
>
> WinPE 5.0 apparently fixes a terrible bug in WinPE 4 ( http://support.microsoft.com/kb/2853726 ), so I was hoping to be able to use it even though it's not officially released.

Hello Brian,

After eyeballing both your screenshot and the Microsoft KB, there's no
specific mention of anything bootmgr related... Can you just extract
the bootmgr from a WinPE 4 ISO and use that instead?

Bootmgr--much to our chagrin--hasn't exactly changed a whole lot in
the last six years... The one included in WinPE 4 should likely work
for booting WinPE 5.

Should!  :)

Cheers,
Andrew Bobulsky