im going absolutely crazy trying to fix this. my laptop is running on windows 7 home 32 bit. when i connect my phone to my computer it charges and i get the MTP-initialization notification and that its connected to usb on my phone, but my computer doesnt recognize the device or the drivers i installed through kies. its driving me mad! ive tried EVERYTHING uninstalling/installing kies, troubleshooting on kies multiple times and it says my computer is unable to install the drivers, made sure my computer was updated, enabled usb debugging on my phone, tried manually accessing the device on my computer and it shows up as "unknown device"! after about 5 minutes of having my phone connected, i got a notification saying "one of the usb devices connected to this computer has malfunctioned, windows does not recognize it". i thought maybe it was because i was using a blackberry charger so now im using my moms android usb cable and STILL im having the same problems. i tried uninstalling the drivers and kies and re-installing multiple times and it just will not work. ive tried the windows troubleshooting application and samsung kies troubleshooting and it says its an unknown decive. i desperately need help! i need to update my phone to jellybean 4.1 ive been waiting forever for this update and now i cant even install it!! HELP ME PLEASE 
