Installing 32 bit apps on X64 bit system

[miki2soft]

On current 64-bit builds when a user attempts to
install a driver package with an undecorated INF file on the wrong
architecture, it will fail in an unintuitive way. This is especially a
problem on X64\AMD64 systems since many of these users do not distinguish
between x86 and X64 drivers. By enforcing INF decorations, only drivers
targeting X64 systems will be allowed to install. This will reduce support
costs for our partners and improve the customer experience.

Example:
The following sample shows the same [Manufacturer] and [Models] sections
with a TargetOSVersion decoration that specifies the x64-based platform,
where "x64" refers to the 64-bit architecture used in AMD64 and Intel
Extended Memory 64 Technology systems. The .ntamd64 decoration in the INF
is used for all x64-based systems.

[Manufacturer]
%mycompany% = MyCompanyModels, NTamd64

[MyCompanyModels.NTamd64]
%MyDev% = mydevInstall, mydevHwid

INFs that do not have [Manufacturer] sections are not impacted by this
change.

How to work around INF decoration enforcement:

Method 1: To turn off the undecorated models check for AMD64, create the
following non-zero number registry value:
HKLM\Software\Microsoft\Windows\CurrentVersion\Set up: REG_DWORD:
DisableDecoratedModelsRequirement
Set it to say 1, reboot, and then you will be able to install undecorated
INFs on amd64.

Method 2: You can manually add decorations to INFs using the information
above or by referencing other decorated X64 driver infs. This will break
the signature of a signed driver. In this case, the unsigned driver
dialogue will appear, but the driver will install.

A picture view of method 1 works fine on my 64 bit system

HKLM\Software\Microsoft\Windows\CurrentVersion\Set up: REG_DWORD:
DisableDecoratedModelsRequirement


http://img146.exs.cx/img146/8669/pic13vc.jpg


http://img146.exs.cx/img146/4973/pic27bz.jpg


http://img146.exs.cx/img146/3056/pic37rf.jpg[/url]

Note very important you must make a new dword named :
DisableDecoratedModelsRequirement
Set it to say 1, reboot, and then you will be able to install undecorated
INFs on amd64.

[cloasters]

Welcome to AOA Forums, miki2soft!

Very interesting post, thanks!