Forum Discussion
farleyduhaa7
May 22, 2025Iron Contributor
How to install Windows 11 on ThinkPad T420 laptop?
I am seeking assistance on how to install Windows 11 on ThinkPad T420 laptop, which is an older model and I am unsure whether it is compatible with the latest operating system. My main concern is und...
HarperLake
May 22, 2025Iron Contributor
Installing Windows 11 on ThinkPad T420 involves several steps, including checking hardware compatibility, preparing installation media, and performing the installation. Here's a detailed guide to help you through the process:
1. Verify Hardware Compatibility
- TPM and Secure Boot: The ThinkPad T420 does not have a TPM 2.0 module and may not support Secure Boot, which are requirements for Windows 11. However, it's possible to bypass these checks, but be aware of potential security and stability issues.
- Processor: The T420 has an Intel Core i5/i7 2nd or 3rd generation CPU, which is not officially supported by Windows 11. You can attempt to install Windows 11 by bypassing the CPU compatibility check.
- RAM and Storage: Ensure you have at least 4GB RAM and 64GB storage.
2. Create Windows 11 Installation Media
3. Prepare BIOS Settings
- Restart your T420 and press F1 during boot to enter BIOS Setup.
- Disable Secure Boot if enabled.
- Set the boot mode to Legacy BIOS or enable CSM (Compatibility Support Module).
- Save changes and exit.
4. Insert the bootable USB. Restart and press F12 (or the key that opens the boot menu) to select the USB drive as boot device.
5. Install Windows 11 on ThinkPad T420
- Follow on-screen instructions.
- When prompted for product key, you can skip if you want to install without activation initially.
- During installation, choose custom installation and format the drive if necessary.