on 27-01-2013 11:55
on 27-01-2013 12:39
Have you rebooted the PC?
Have you tried a different USB port and cable ?
I'm gonna need more than one line answers from you with better info if you want help......
27-01-2013 13:42 - edited 27-01-2013 13:45
There's an genius program you can download, that lets you see what device is registered to any USB port on your computer system. I will place a link at the end of this once I find it again.
Essentially when you plug in a device another time to a port it will use information from the registry, although there is a limit to how many devices can be installed. Something like 64 overall, not sure of the proper number though.
The Nexus 4 might not be covered by the Google ADB (Android Device Bridge...me thinks) driver and it worth checking the version you are using is compatible. Secondly, make sure USB Debugging is turned on in the Developer settings under your System on the Nexus 4. Otherwise, it might not be picked up.
I think as the Nexus 7 is a tablet computer already, it maybe doesn't need prompted to change device type as primarily is not a mobile handset. I might be barking up the wrong tree, however Einstein would be proud of that theory maybe. ;-)
P.S. USB Debugging is used when making system changes such as firmware updates.
on 27-01-2013 16:44
On my Nexus 4 running XP it couldn't find any drivers but having it under usb debugging did allow it to be seen as a mass storage device. However, I did purchase this program as I needed Outlook sync: http://www.android-sync.com/ and it does install the right usb drivers. Check out the quick start page as it may also help in solving the issue.
I'll add that it is about £20 and worth every penny if you need local Outlook synchronisation. (and one big reason I didn't put the Nexus4 up for sale!).