Okay so today I was playing Minecraft and all of a sudden a message popped up that said 3rd party app manager has to be closed, so I clicked okay. Minecraft crashed and anything Java related will not open, and anything that was in Program Files x86 cannot be found... So I went into my Program Files only to find most of it HAD BEEN DELETED!!! I have no idea how to get it back and any help would be very helpful. I tried System Recovery to a certain point and it just failed... So please help me.
EDIT - I forgot to mention the internet will not open either, it may look funny because I have to use internet to post, but this isn't the computer it happened on...