I was trying to run the game. I have Windows XP SP3. I downloaded game via gog downloader. I receive error 'not a valid win32 application' upon running after installation. Is this software 64-bit only?

It says it is XP compatible but considering how crappy and old it is, expecting it to run under 64 bit is a bit of a push. I'm sure someone will be able to help you out.

So did the GOG page.

GOG page still lists XP as valid system.

So Windows Vista would be a no go then?? :\

Probably, the GOG's page now lists only Win7 through 10 as valid OS'es.

I can confirm that it will not work for me on my Vista computer but is fine on 7. It installs fine, but gives a DEP error. When I try to disable data execution prevention on the exe, it tells me the game cannot run with it off.

Same problem as above. Game installed but will not run - comes up with "DOTT has stopped working. Windows will close the program and inform you if there is a solution to the problem." Needless to say no solution has so far been forthcoming.

I am running Windows 7 Professional 64 bit with 8GB RAM. Any ideas anyone?

This topic is about running it on XP/Vista.
For your problem, see: https://www.gog.com/forum/day_of_the_tentacle_remastered/will_not_load
Try installing the latest driver for your graphics card.

Thanks so much. It took me a while to work out how to do it, but finally managed to update my Nvidia driver to the latest version for my graphics card and it now works perfectly - brilliant! I'm off to play....

The game isn't XP compatible - well... at least not out of the box. The error message is related to this article:

https://software.intel.com/en-us/articles/linking-applications-using-visual-studio-2012-to-run-on-windows-xp

But according to this blog post:

http://www.tripleboot.org/?p=423

... it's actually possible to patch such an executable, to make it run under XP without any problems. This does work with "Day of the Tentacle Remastered" too:

● first of all, make a backup of your Dott.exe
● then open your original Dott.exe into a hex editor (like HxD, Hex Workshop or similar)
● replace the first instance of the hex value 06000000000000000600000000000000 with 05000100000000000500010000000000 (there should be only one instance in the whole file)
● replace the hex value 4765745469636B436F756E743634 with 4765745469636B436F756E740000 (only one instance too)
● save the changes

That's it. The game should now run under Windows XP SP3. I tried it myself and finished the play-through under XP without any problems at all...

Nice, Morpheus!