Well, 1.43 is what I used as well, but the currently downloadable version from the site; not the variant you're using.
That might be the issue. I've tried 1.43 on 8.1 64-Bit installs on two machines here, and both have crashed. As I said, I remember being on 7 64 with a similar problem. Now, the install I last tried was on a fully patched clean 8.1 64-Bit install. Tried all what one would expect too: Run as admin, compatibility settings with previous OS versions; you name it.
The only issue I'd be hard-pressed to consider a problem is that the machines are Core 2 Duo-based, and not Core i-Series (and have integrated Intel graphics). Still, I have successfully installed and run OpenBVE on a Core 2 machine in the past (on Vista and 7), albeit, I believe they were 32-Bit installs.
Anyhow, I'd try this other build if I'm pointed to a link...
![Wink ;)](https://forums.bvestation.com/Smileys/default/wink.gif)
EDIT: Hmm, is this it?
http://www.shadow93.info/CT1660/openBVE_DLC_files/openbve_stable.7zLet's give that a try...
Nope. Not a chance, and I did see it's 1.43
a. I'm guessing that was the build you meant.
![Sad :(](https://forums.bvestation.com/Smileys/default/sad.gif)