I've found issues with installing and running carmageddon 2 under windows 10 (build 9926).
The install seems to install everything then stops and won't end normally, seems to sit at 100%. I closed the install and the game seems installed.

I tried running it, and it just stalls completely without error notices.
carma2_hw.exe loads into the active processes (consuming about 848kb's of memory, once in awhile moving up to 852kb and then back down), but that's all it does, it will sit there until I force close it. CPU usage reads 8.4 to 8.9% the entire time until i close the program but nothing ever happens.

Windows says its running normally. And I've tried all the compatibility settings. I've even tried installing it on another system under windows 7 (which it does fine) and overwriting the folder on windows 10, but this makes no difference.

So far, of the few games I've tried, this is the only one with issues from GoG.com.

Does anyone have any thoughts or suggestions? You'd think since 10 is just a modified 8.1 core it should work fine.
Or am I just out of luck until 10 officially releases, and gog can update the game?

Quick suggestion, that may or may not work. Try running the game twice. There was a case when Windows would be trying to get info of a game for the Games Explorer that would stall, so launching the game a second time would bypass said problem. Not sure if Windows 10 still uses Games Explorer though, or even if that would help.

I tried your suggestion, and unfortunately it didn't change anything :/
I'm not sure if 10 uses games explorer, I can't find much on it or in active services.

I'm also curious why so far, Nox and Septerra core both install and run (they have a few issues, but they run and are playable), but carmageddon can't do either very well.
Must be something program specific that carmageddon does that others don't that doesn't like windows 10. I just don't know what that would be :/

Omg that worked!!
It started up instantly and ran just fine^^

Thank you so much!! ^^

p.s. sorry it took me a few days to reply. But thank you^^

Biggest villain is solely wsock32.dll as winmm.dll controls playing music in game so without winmm.dll it's disabled completely.

Copying winmm.dll from sys32 over into the directory solved the issue for me. It's the same fix for Rainbow Six 1

This is the same as remove or rename the file, since game searching for the file in sys dir then.
When you remove (or replace with default) the file (CD Audio wrapper) there is no music in game - game trying to play Audio CD instead (as in CD release where no such file included).
If you have older GOG C2 release try this http://rr2000.toshiba-3.com/R4/PC/carma-winmm.zip (AFAIK in current version it is updated, however this version may not work on older PC). So if this one not work either for you, just remove or rename the file.

On Win10 this file works for most of games that are broken (either not responding or eating high load of CPU and not running). I tested it with Carma, Carma2, Quake1, Quake2, Timeshock and many others. The only quirk with it in Carma2 is that it restart music every loading screen/map change.

<span class="bold">https://www.dropbox.com/s/0om4bakhoe5qckp/winmm.dll?dl=0</span>

Thank you for the testing and information.

The file you have linked is exactly the same as I linked above, but without required libraries.

Music in C1/C2 is restarted when playing from CD too (without winmm.dll wrapper) - the game just control the CD player.