Windows XP x64 compatibility mode

[Anixx]

Is it possible to somehow get the compatibility mode emulating Win XP x64 or Win Server 2003 x64 for Win7?

 

[LMiller7]

XP Mode is an image of 32 bit XP. No others are available. To run 64 bit XP or Server 2003 (or any other OS) you would need a legal copy of the OS and run it under VirtualPC or some other virtualizer program.

 

[Anixx]

XP Mode is an image of 32 bit XP. No others are available. To run 64 bit XP or Server 2003 (or any other OS) you would need a legal copy of the OS and run it under VirtualPC or some other virtualizer program.

You possibly misunderstood me. I am not talking about the Virtual PC XP Mode, but about compatibility mode for running applications.

 

[LMiller7]

Are you trying to run a 64 bit program designed for 64 bit XP or server 2003?
It would help if you could describe exactly what you are trying to do.

 

[Anixx]

Are you trying to run a 64 bit program designed for 64 bit XP or server 2003?
It would help if you could describe exactly what you are trying to do.

Yes, the 32-bit version of the software runs well under Win2000 Compatibility mode (and under XP compatibility mode but with UAC prompt). The software does not run without compatibility mode. I wonder if there a way to run a 64-bit version of the same software?

May be such mode exists under Win8?

 

[KingKoopaDE]

Even if this Thread is older here are a few observations I found:
Setting WINSRV03SP1 under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers or the HKCU equivalent did work for 32 Bit applications and reported 5.2.3790 SP1 even on Windows 11. What it didn't do was set the basic theme unlike Windows XP compat mode (idk if the one from Win 7 does this already because there you still have DisableDWM).

The sad thing is, it doesn't work on 64 Bit exe files, the way is to add the EXE file to Application Verifier and check Compatibility and HighVersionLie, then right click and click Properties and set the following:
Major: 5 Minor: 2 Build: 3790 Service Pack Major: 2 Service Pack Minor: 0 Suite Mask: 256 Product Type: 1 CSD Version: Service Pack 2 (or the Service Pack you want)
Further interesting observation is, that all compat modes that got removed from the UI, still work in recent Win Versions so setting in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers:
NT4SP5
WIN2000
WINSRV03SP1 as already mentioned
WINSRV08SP1

do still report the right version.
Also interesting setting DISABLETHEMES in Win8 or higher does either disable Themes for all controls or if you set a compat mode which disables DWM composition (e.g. XP) then it does turn into full classic.

For the 64 Bit Version Lie (over Application Verifier) there's a little downside, that it does only override the Win32 GetVersion(Ex) and not the NTDLL RtlGetVersion, and also does not change the output you get from the registry.
I also tried Compat Administrator setting the VersionLie here without success for 64 Bit App.
What is intresting in Compat Administrator, that there are way more Versionlies aviable which could be used.

 

[townsbg]

There is no 64-bit compatibility on 32-bit due to the architectural differences. You must have the 64 bit version of Windows and this isn't just XP.

 

[KingKoopaDE]

There was an AMD64 Version of Windows XP and we a talking about the lack of a proper compaibility mode for that exact Version in modern Widnows (Vista-11).
This Version was based on Windows Server 2003 and used the NT 5.2 Kernel instead of the XP 5.1 one.
This circumstance is problematic cause it was the first AMD64 release of Windows.
Look at: Windows XP Professional x64 Edition - Wikipedia