Windows Phone 8 Emulator not launching. Error code 0x80131500

Question

I have problem with Visual Studio 2012 (OS: Windows 8.1 Preview)

1. Create empty project (Windows Phone App)
2. Press F5 to start debugging.

Answer 1

I installed Windows Phone 8 SDK. Emulator didn't work because Hyper-V was not turned on. I installed Hyper-V from Programs & Features and got the 0x80131500 error.

Visual Studio 2012 Update 4 fixed the issue.