Nexus 7 Doesn't Show Up As Media Device (MTP)
When connecting my Nexus 7 to my Windows 7 computer, it doesn't show up in neither Windows Explorer > My Computer nor Device Manager > Portable Devices.
I did, however, install the Google USB driver, which allows USB debugging for Android development, and that driver shows up under Device Manager > Android Devices
Also, when the Nexus 7 is connected via USB to the Windows 7 Computer, the setting on the device is correctly selected/checked to connect as a media device: Notifications (Swipe down) > USB Computer Connection > Connect as Media Device (MTP)
However, when I connect my Galaxy Nexus phone, it shows up in both Device Manager > Android Devices and Device Manager > Portable Devices, which in turn shows up under Windows Explorer > My Computer allowing me to actually use it as an MTP device.
How can I access my Nexus 7 as a media device under Windows 7?
As I posted in this question on Android.SE, I was able to get my MTP mode working again. FYI I don't know how this affects the debugging interface since I haven't checked that out yet, but this should let you access it as a drive.
From that answer (slightly modified based on your images):
What worked for me (on Windows) was:
- Plug the Nexus 7 into your computer with the USB cable.
- Open Device Manager.
- Find "Android Device" near the top and expand the node. Double click on "Android Composite ADB Interface".
- In the properties window that pops up, uninstall the driver (I chose to delete the current driver as well, not sure if that matters).
- Unplug the tablet and plug it back in.
At this point mine got recognized as a Nexus 7 instead of an Android ADB device and allowed me to transfer files again.