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Downgrade any xx30 series ThinkPad to an 1vyrain compatible BIOS version.
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George Kushnir de40d08e30 Added X230t support. 4 years ago
BIOS Added X230t support. 4 years ago
README.md Update README.md 4 years ago
downgrade.bat Added X230t support. 4 years ago

README.md 

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Downgrade any xx30 series ThinkPad to the latest 1vyrain compatible BIOS version.

Usage

Go into your BIOS setup. Navigate to Security -> UEFI BIOS Update Option. Set Flash BIOS Updating by End-Users to Enabled, and Secure RollBack Prevention to Disabled.

Boot into any 64-bit Windows install.

Run downgrade.bat (NOT as Administrator - WinFlash64 should request admin on its own). The system will reboot and flash the BIOS region on your device. Voila! You're ready to run 1vyrain.

NOTE: Neither this tool nor 1vyrain will modify your EC. You are safe to flash your EC with the battery or keyboard mod at any time as long as you are on a version compatible with the EC mod (check compatibility here). Both IVprep and 1vyrain will only modify the BIOS region! You can safely use 1vyrain to update to the latest BIOS without losing your other mods!