alright, i ran the .net framework repair tool and it said to reinstall the .net framework. i'm not sure how to reinstall it, so i tried everything i tried before again. nothing changed, apart from one thing: when i ran the PdnRepair program, it did the same thing it did initially, freezing right before completion, but this time it froze at 0 seconds instead of 1 second. when i tried again, the same error popped up in the command prompt that opens with it. i tried opening the installer again, but the same error popped up. i'm guessing it's because i didn't properly use the .net framework repair tool.