Jailbreak Windows Rt 8.1 Surface
WARNING: This exploit was patched in September 2019 by Microsoft’s monthly rollup. You must uninstall update KB4520005 or use an offline system. This guide is for educational archiving only.
Wait for the Magic: You will see a Windows Script Host popup claiming a license error. Ignore it. After 10 seconds, the script runs gacinstaller to permanently install an un-signed Microsoft-signed certificate.
Patching the Kernel (Optional but Required for .exe):
Install "RT Seven": To make the jailbreak permanent across reboots, users installed RT Seven — a custom loader that re-patches the kernel on every boot. jailbreak windows rt 8.1 surface
On your working Windows PC:
The Surface will restart. You must be very quick:
Hardware:
Software:
Crucial Step: Ensure your Surface battery is above 80%. Losing power during the final step can corrupt your user profile.
The biggest annoyance: Every full shutdown kills the jailbreak. WARNING: This exploit was patched in September 2019
The Workaround: Never shut down. Use Sleep only. The Surface RT has excellent connected standby. However, if the battery dies or you must reboot for updates, you re-run the 5-minute jailbreak process.
The Advanced Solution (Registry Mod):
Some advanced users modify the BCD (Boot Configuration Data) to force Test Mode permanently:
At the command prompt (usually X:\):
Microsoft left them to die. The Windows RT 8.1 device—your beautiful, VaporMg-cased Surface—is a digital ghost ship. The store is closed. Updates are myths. But under that locked bootloader lives a full, ARM-native Windows NT kernel. It hungers for unsigned code.
Jailbreaking RT 8.1 isn’t about piracy. It’s about resurrection.