The error you are experiencing is mainly because of the reasons below
- Your processor does not have Intel Virtualisation Technology VT-x support.
- You might have not enabled the Intel Virtualisation Technology VT-x in your system BIOS setup utility.
- You might not have the feature or might not have enabled the Intel Execute Disable(XD) Bit in the system BIOS setup utility
- If you were using the HAXM on the same processor on Windows earlier OS then it states that you have not installed the motherboard's drivers for the Windows 8 Release Preview OS.
The above two features are highlighted as Intel Virtualisation Technology VT-x,VT-d and Intel Execution Disable (XD) bit.
The system requirements for the Intel HAXM states that it requires an Intel processor with support for VT-x,EM64T, and the Execute Disable (XD) Bit functionality.
If you would like to check that your processor possesses these two features or not you may checkyour processor on the Intel website with your processor's model number.
If at the end your processor has the Intel Virtualisation Technology(VT-x) and the Execution Disable (XD) Bit and you have used Intel HAXM on the Windows earlier OS versions then you have to wait for the Windows 8 Release Preview version's support by Intel HAXM, as you can see that the Supported OS does not include Windows 8 Release Preview.
According to this site: http://forums.ouya.tv/discussion/82/windows-8-how-to-install-intel-haxm-after-installing-hyper-v ; ; the issue is haxm is conflicting with the HyperV.
I followed the instructions, ran msconfig, and set the new config as my default and then I could install. The Android emulator claims it's working, though it feels slower than it used to. Haven't had a chance to try without to make sure it's actually working.