I use Samsung Galaxy S4 Mini Android Phone, its MTP mode is not working just after I plugged it in to another PC some time for just USB charging.
I re-installed the driver on my PC and removed the device, re-installed the driver again, and tried some methods like these.
But it was not working with my PC, however, I can view the files on the smart phone with the ADB command on the command prompt.
I am not sure what the situation is.
I cannot connect it via MTP, and its driver failed to install, showing exclamation mark on the Windows Device Manager.
However, I can view the files with ADB command, but not convenient as MTP connnection.
Can I recover this device to be shown without exclamation mark? Everytime when I connect the phone, My Windows 7 tries to install the driver but failed, but ADB works.
I searched many internet sites for the solution, but I tried regedit to remove "UpperFilters", deleted and re-installed driver, tried PTP mode (even it seems not working), and etc.
I am also thinking there might be a problem on the phone itself. (Because I have rooted it once)
Can I get some help from any expert? Thanks very much in advance.