

The driver tab for that entity is dated 0 with version 2.11.7.0 from "SAMSUNG Electronics Co., Ltd." Note this version is different than the one downloaded directly from Samsung (see link below) which is 1.5.14.0. There is now an entry under Universal Serial Bus controllers named "SAMSUNG Mobile USB Composite Device".

Plugged the phone into a USB 3.0 port - device was recognized and installed itself.Plugged the phone into a standard USB port - still unresolved.Expand System Devices and repeat removal of non-present devices.Right-click uninstall all entities that appeared in gray.Expand Universal Serial Bus controllers.Clicked VIEW > enabled SHOW HIDDEN DEVICES.Type: set devmgr_show_nonpresent_devices=yes.Open an elevated CMD prompt, if logged in as a non-admin.I ended up doing the following, while the phone was untethered, and after installing the Samsung driver: On my Win8.1 system, even with Samsung's official driver installed (see link below), my SGH-I727 Galaxy SII Skyrocket would not connect over USB - neither with MTP nor PTP enabled on the device under Settings > Storage > USB Computer Connection. 2014-April: I agree this is an issue with Windows 8 / 8.1 and this approach was only successful by happenstance.
