This is not an AMD or PC support forum.
You need to ask the people that can actually help you.
But, AMD have posted an FAQ that might be your problem? https://forums.minecraftforge.net/topic/123710-minecraft-1194-forge-crash/?do=findComment&comment=537535
The correct way to get a full reinstall of minecraft is:
* Find your .minecraft folder and rename it something else, e.g. oldminecraft
* then reinstall minecraft and forge
If you don't move the .minecraft folder out of the way, you will probably just be reinstalling over old files that don't get replaced and might be corrupted in some way?
But you obviously need to keep some of your old files like your saves.