Oh boy. If another program is able to use GL2.1 then it sounds like your drivers are at least installed right, but something is blocking PixelCNC from using them properly and Windows is defaulting to the fallback Microsoft driver. In all my days of programming and using Windows I have never seen anything like this, that's 20+ years. The closest I've seen is that if one program can't use OpenGL, none of them can.Well, this gives me more hope than ever before that we can get it running for you but it looks like the ball is fully in my court now and you've nothing left to do on your end. I'm going to do some investigating and I'll email you a link in a day or two to one or more new PixelCNC executables you can place in your PixelCNC folder to run instead, so we can start narrowing down the problem. Good work!
Viewing post in Help launching PixelCNC
Well if that didn't give me hope I don't know what it'll take. I'm so glad that caught my attention earlier. I hope it's an easy one for you or at the very least it's one that pays for itself in future versions if we can get it solved here. Thanks again for all your effort on this. I can tell you really care about the software you've created.