Why won't my computer recognise my Galaxy S3?

A

AC Question

Computer Won't Recognise Galaxy S3

My phone can be charged by my computer but is not recognised. I've tried installing the newest drivers and kies but that won't help. Another suggestion that I read was to download the Samsung driver ver. 1.4.6.0 but I can't find that either. Thanks for the help.

(Also I accidentally turned by device to ptp and since my computer won't recognise my phone I can't change it back if you could also help with that)

Thanks!