Exclamation [Q] Omnia II usb problem

Hi people. i have a pre-owned (by my father) Samsung Omnia II and every time i connect it to my computer, the phone gets freezed and i have to restart it. it's a problem my dad already had for a long time, but it didn't bother him. now i want to install android and i need to solve it. i have just done a hard reset and the problem persists. does anyone know how to fix it? thanks.