64-bit Version not compatible with XP x64 #5399

New issue

Closed

opened 2026-02-21 17:49:57 -05:00 by deekerman · 2 comments

deekerman commented

2026-02-21 17:49:57 -05:00

Owner

Originally created by @sledrewr on GitHub (Apr 3, 2017).

The version is 3.3.11 64 bit

The problem is that the program throws an error "This is not a valid Win32 Application" when launching

The expected behavior is that it should work on XP x64 as it does on its 32-bit counterpart

It shouldn't be too difficult to re-configure your compiler to add XP x64 as a target OS.

Thanks

Originally created by @sledrewr on GitHub (Apr 3, 2017). The version is 3.3.11 64 bit The problem is that the program throws an error "This is not a valid Win32 Application" when launching The expected behavior is that it should work on XP x64 as it does on its 32-bit counterpart It shouldn't be too difficult to re-configure your compiler to add XP x64 as a target OS. Thanks

deekerman closed this issue

2026-02-21 17:49:59 -05:00

deekerman commented

2026-02-21 17:50:02 -05:00

Author

Owner

@sledgehammer999 commented on GitHub (Apr 4, 2017):

The expected behavior is that it should work on XP x64 as it does on its 32-bit counterpart

No this isn't expected behavior. It is clearly stated in the Download page that the 64-bit installer is compatible with Vista+.

It shouldn't be too difficult to re-configure your compiler to add XP x64 as a target OS.

64-bit Windows XP has a "different flavor" of 64-bit. I cannot explain it well, but the bottom line is that it would require me to have another set of compiled libraries that would be compatible with it. That version wouldn't be compatible with 64-bit Vista+ versions. So I would need to maintain locally 3 toolchains(32-bit, 64-bit Vista+, 64-bit XP). It isn't worth it for Windows XP 64bit.

Unless, I am mistaken the XP figures have dropped significantly nowadays and I expect the 64-bit version(XP) to be even lower. Also as I have stated in my v3.3.11 changelog Qt 5.8 has dropped XP support and myself I am uncertain on how long I will continue to provide builds for XP anyways.

I am very tempted with the next major release to drop XP.

@sledgehammer999 commented on GitHub (Apr 4, 2017): >The expected behavior is that it should work on XP x64 as it does on its 32-bit counterpart No this isn't expected behavior. It is clearly stated in the Download page that the 64-bit installer is compatible with Vista+. >It shouldn't be too difficult to re-configure your compiler to add XP x64 as a target OS. 64-bit Windows XP has a "different flavor" of 64-bit. I cannot explain it well, but the bottom line is that it would require me to have another set of compiled libraries that would be compatible with it. That version wouldn't be compatible with 64-bit Vista+ versions. So I would need to maintain locally 3 toolchains(32-bit, 64-bit Vista+, 64-bit XP). It isn't worth it for Windows XP 64bit. Unless, I am mistaken the XP figures have dropped significantly nowadays and I expect the 64-bit version(XP) to be even lower. Also as I have stated in my v3.3.11 changelog Qt 5.8 has dropped XP support and myself I am uncertain on how long I will continue to provide builds for XP anyways. I am very tempted with the next major release to drop XP.

deekerman commented

2026-02-21 17:50:02 -05:00

Author

Owner

@hrxn commented on GitHub (Apr 4, 2017):

I am very tempted with the next major release to drop XP.

Good idea. Considering the fact that even Microsoft dropped support for XP.

@hrxn commented on GitHub (Apr 4, 2017): > I am very tempted with the next major release to drop XP. Good idea. Considering the fact that even *Microsoft* dropped support for XP.