When I try to start the emulator, suddenly I started getting this error

everything worked couple of days ago. if I disable GPU acceleration then it works but very slowly.
I tried re-enabling virtualization in the bios and it worked once and now I get the same error again..
I have the latest android studio 2.2.1 I have a new graphics card GeForce.
this is the error message
Hax is enabled
init: Could not find wglGetExtensionsStringARB!
getGLES2ExtensionString: Could not find GLES 2.x config! Hax ram_size 0x60000000
HAX is working and emulator runs in fast virt mode.
Failed to obtain GLES 2.x extensions string!
Could not initialize emulated framebuffer
emulator: Listening for console connections on port: 5554
emulator: Serial number of this emulator (for ADB): emulator-5554
emulator: ERROR: Could not initialize OpenglES emulation, use '-gpu off' to disable it.