Default [Q] Help.. cant install MTP driver

Hi all..
i could really use some help, everything was working fine untill a couple of days ago, now every time i connect my s4 mini to my computer, Windows wants to install MTP-USB driver and fails, tried to use different usb ports and cables, reinstalled drivers and tried other computers, but it all fails... so please be so kind and help me out....

btw could i have killed the MTP app on my Phone with Memory Booster ?