Just a quick update. i found some advice on the Microsoft forum that suggested that i turned my phone off and on. Yeah right! i thought, but I had the windows phone app running on my mac anc connected my phone and as normal it was not recognised.
Then I turned my phone off and on. On restarting the app recognised my phone :) Now i can connect anytime and sync my music etc. Hope this solution helps anyone else having this problem.
Thanks Steve, you just saved me lot of time :)
My situation was a bit different, just dumping all steps in case they be of some help to others:
- Windows 7 Ultimate SP1 x64
- Didn't read any docs :) and just plugged-in the Lumia
- Couldn't see the phone as a drive in Windows Explorer under "Portable Devices"
- Went to "Devices and Printers" and saw there was an app to install
- Installed Window Phone app for Desktop
- Went back to "Devices and Printers" and opened the app
- The app would sit there waiting for me to plug-in the phone (which of course was already plugged-in)
- Plugged in and out several times
- Checked "Device Manager" under "Computer Management" and saw that the "Windows Phone" device (under "Portable Devices") couldn't be started
- Tried updating, disabling/re-enabling, nothing worked
At this point I was taken off-track by an old "Nokia 3600 Slide" folder in Windows Explorer and by a problem with another device (Broadcom 5880), but anyway these is what I did after:
- Uninstalled Window Phone app for Desktop
- Uninstalled "Windows Phone" device (under "Portable Devices")
- Rebooted
- Plugged-in the Lumia
- The "Driver Software Installation" dialog started installing devices "RM-820|Nokia Lumia 920" and "MTP USB device"
- Both failed, the first simply disappeared while the second was under "Portable Devices" but was not working
- Decided it was time to find some help and found this thread :)
- Rebooted the Lumia while still plugged-in
- The "MTP USB device" finally turned into a working "Windows Phone" device
- The Lumia appeared in Windows Explorer and I could access it without problems
I then re-installed Window Phone app for Desktop and it worked flawlessly from that point on.
I wrote this whole step-by-step thing because I'm not sure whether uninstalling Window Phone app for Desktop and the "Windows Phone" driver had anything to do with it, maybe it would have been enough to reboot the phone while plugged-in.
As a side note, when the "Driver Software Installation" dialog popped up after rebooting the phone, another device named "NOKIA BOOTMGR" appeared along with the "Windows Phone" device. While the "Windows Phone" one installed correctly, this new one
failed with error message "Device unplugged".
Everything is working anyway, thanks again.
Edit: for the sake of completeness, the machine had already installed Zune (paired with an Omnia 7 phone), Samsung USB Driver for Mobile Phones, Microsoft Expression Blend SDK for Windows Phone 7 and Microsoft Expression
Blend SDK for Windows Phone 7.1