Experiencing the same on Windows 7...have tried everything suggested
Really hoping someone can help because I've just about had it with this. I'm running Windows 7 Home Premium 64-bit. I have a brand new Nexus 5 16GB. As others have indicated, when I plug my phone into my computer with debugging enabled, it creates an "Android Composite ADB Interface" device listed under "ACER Device" in Device Manager. See attachment.
I have tried every permutation of the 'uninstall driver, manually install Google USB driver' solution, to no avail. The best way I can describe what I'm seeing is that Windows is forcibly categorizing the device as an 'ACER Device' even though the driver files themselves are telling it otherwise.
If debugging is DISABLED, and EITHER MTP or PTP is ENABLED, everything is just fine - the default Windows drivers for those devices kick in, and no 'ACER Device' category is created.
If debugging is ENABLED, and MTP and PTP are DISABLED, when I tell Windows to use the Google USB driver, it says that the device could not be installed.
If debugging is ENABLED, and MTP is ENABLED, the 'ACER Device' issue rears its ugly head even when I tell Windows to use the Google USB driver.
I've already disabled Windows automatically fetching a driver online, so that's not to blame.
If this is the result of a Windows Update, does anyone know the number of the update so I might try uninstalling it? I can't seem to find it despite searching.
Hoping someone out there can help. Thanks!