Ensure your laptop is plugged into an AC adapter. Do not rely on battery power.
What specific (e.g., T480, X1 Carbon Gen 9) you are configuring.
The utility allows users to write the following data directly to the system's EEPROM:
The , distributed via the executable file i7tm38us.exe , is a critical system utility designed for technicians, system administrators, and hardware enthusiasts. i7tm38us 1.90 version.exe download
If you have followed this guide but still cannot locate a legitimate version 1.90, consider whether your hardware truly needs this update. Sometimes, if the device is stable on an earlier firmware version (e.g., 1.85), the risk of bricking outweighs the benefits of upgrading.
: Always prioritize official websites or platforms for downloading software. This ensures you're getting a legitimate copy of the software, reducing the risk of malware.
⚙️ Step-by-Step Guide to Updating Serial Numbers and UUIDs Ensure your laptop is plugged into an AC adapter
While this utility is vital for repairs, it is an internal Lenovo tool and is not typically hosted on public-facing support pages. Users should be aware of the following:
🛡️ If encrypted, suspend BitLocker to avoid lockout. Troubleshooting Common Issues The Update Failed to Start
: Before executing any downloaded file, ensure it's from a trusted source. Look for digital signatures or hashes provided by the developer to verify the file's integrity and authenticity. The utility allows users to write the following
EEPROM Branding, UUID Generation, Asset ID Management, Serial Number Correction.
Because the utility modifies low-level EEPROM code, it cannot execute inside an active Windows kernel environment. You must build an independent, bare-metal boot environment.