I have been using Intel HAXM before with no issues, however when Android Studio 2.0 released I reinstalled the IDE and it prompted me to install HAXM before starting the emulator. The installation went through (and still goes) successfully however Android Studio still says intel HAXM is not installed.
I also tried running the setup (intelhaxm-android.exe) manually from the SDK, but the GUI pops up and dissappears quickly.
I even tried running the setup available on Intel's website but the same happened.
and have no antivirus installed.