Edit

Ok, I finally got it open Thank you for the help!

So in the screen shot, I have the Jar file. When I try to click and run it, the error message pops up and wont start forge installer. Me and my Dad have tried everything to fix it but I cant find anything and neither can he. Do you have any ideas?

I downloaded the 1.11.2 installer on that EXACT page and it downloads fine but when i try to open it it says class not registered

I tried to download the installer but it tries to open in launch windows application, and it fails to open and says "Class not Registered." Im so confused