So when I plug my phone into my laptop I can hear the sound that it makes when you insert a device into it but when I go to my computer there is no sign of it at all. All the drivers are up to date and I tried to install Kies but it never gets past the connecting screen. I have tried everything I can think of. I have uninstalled all the drivers and re-installed them. I made sure it is in MTP mode when I plug it in. I thought it might be my USB drivers or something but I can connect other things to them without anything going wrong. I am running CM10 and I thought it might be that so I tried two other GS3's with stock Android and still the same thing. I just connected it to my laptop like 2 weeks ago so I am really confused as to what could possibly happen in that time.