2009/6/27 Michel Catudal <michelcatu...@gmail.com>:
> Out of curiosity, do you mean to say that the driver will not load at
> all if not signed under vista 64 and Win 7?
> This would be a serious reason for me not to let IS change my system
> from XP.
>
> I have several very expensive pieces of software at work that are not
> signed but installed fine except for the annoying messages that the
> driver was not signed.
>

http://www.microsoft.com/whdc/winlogo/drvsign/drvsign.mspx
"x64 versions of Windows Vista and Windows Server 2008
require Kernel Mode Code Signing (KMCS) in order to load
kernel-mode software."

More details:
http://www.microsoft.com/whdc/winlogo/drvsign/kmsigning.mspx
http://www.microsoft.com/whdc/winlogo/drvsign/kmcs_walkthrough.mspx

Driver is part of kernel-mode software.

>From the above links:
'Using the F8 option. An F8 Advanced Boot Option introduced
with Windows Vista—“Disable Driver Signature Enforcement”—is
available to disable the kernel-signing enforcement only for the
current boot session. This setting does not persist across boot
sessions.'

There are hacks to disable this Vista 64 "feature" permanently.
But it is not recommended.

BTW, why go for 64 bit?

-- 
Xiaofan http://mcuee.blogspot.com
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