Starcraft 1/BW Crashes on Startup (Win11)

I’ve just installed SC/BW for the first time in years, and when I run it, I get a black screen, and a few seconds of loading screen combat sounds effects, and then it crashes. Googling suggested the most common problem was a link with MS OneDrive, which I have now severed, it’s had a restart and a repair, then a reinstall. No dice.

If anyone wants logs, please let me know how to generate them and I’ll get back to you ASAP. I’m on Win11 on a moderately powerful desktop PC that is less than 6 months old. TYIA.