0x89740005
The above error message appears when you try to deploy a Windows Phone Project to a physical Windows Phone device.
Solution:
Launch Windows Phone Developer Registration tool
Start -> All Programs -> Windows Phone SDK 7.1 -> Windows Phone Developer Registration
Insert your Windows Live ID and Password then click on Register button.
Note: The Zune software must be running, the phone connected to your pc, with unlocked screen, with correct date time setting.
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