I've done that when pixey suggest it. It took quite a while to download but it said it had downloaded succesfully.
I'll try to get more details. Give me a couple of minutes.
As far as I could find it installed 4.8 succesfully, I can't seem to find it tho, unlike 4.6.1 or other versions I can't find it anywhere. If I want to download 4.8 it says that I already have it.
I also used a windows NET framework repair tool, didn't seem do anything.