minecraft unknown game launch error.

Unfortunately, as this not being an official Mojang version regulated by Microsoft I cannot offer help. I recommend running the legal version of the game to prevent further issues.

that's not the problem. the usual minecraft works for me. I'm trying to launch a minecraft for developers that was leaked to the network

Hi there КостянКостянов welcome to the community forum! Christopher here, an Xbox fan just like you and has been on Xbox for years already. I would really love to make your day by helping you out. The Display driver is so important here that merely updating it is sometimes not enough. So let's try everything possible to get it working correctly:

Update the Display driver from the PC or Display adapter maker's Support Downloads web page for your exact model number, HP Serial Number or Dell Service Tag - from the sticker on the PC.

While there check also for newer chipset, BIOS/UEFI firmware (very important), network, sound, USB3 and other drivers, comparing to the ones presently installed in Device Manager reached by right clicking the Start Menu.

If this doesn't give you the latest or ideal driver for what you need, compare it to the driver offered by the Intel driver update Utility here: http://www.intel.com/content/www/us/en/support/...

or the Nvidia Update here: http://www.nvidia.com/Download/Scan.aspx?lang=e...

or the AMD autodect utility here: http://support.amd.com/us/gpudownload/windows/P...

For Display issues one fix that is working is to Roll back or Uninstall the Driver on the Display Device > Driver tab, restart PC to reinstall driver.

You can also try older drivers in Device Manager > Display device > Driver tab > Update Driver > Browse > Let Me Pick.

Then you will know you've tried everything in addition to Windows Update drivers.

Adjust the screen resolution until it fits and looks best at Settings > System > Display.

hi there, I just spoke with XBO support and they have recoginsed the last OS update may have cause these issues and are working on a resolution !...I am level 175 in Forza5 and since 17th Dec have had same error code over and over

Did you buy the xbox one from a video game store, if not microsoft Day One has been not putting them in other retailers such as Walmart, Target or etc.