最近搞了个lumia820玩玩，在网上弄了个开发者账号，然后去解锁手机。
出现
For Windows Phone8 phones make sure that the Windows Phone IP Over USB Transport(IpOverUsbSvc) service is running
这种问题，在网上搜寻了一下，发现同样问题的人很多。最后还是找到了一个可用的解决方式
现贴出地址http://social.msdn.microsoft.com/Forums/en-US/wptools/thread/6ebc3669-33a0-4094-95b8-bd7384df141f
和关键部分
I tried every single thing I had read on all the forums. The thing that somehow got it working was to go to device manager and locate the phone (Lumia 920 in my case) in the portable devices and disable it. Then I right clicked and chose "update driver". It somehow found a new driver this time even though it didn't find one before I disabled the device. A new "USB Composite Device" popped up in the "Universal Serial Bus Controllers" and all of sudden everything started working. Hope this helps someone
意思是在设备管理器里禁用你当前的移动设备就可以了
