: Resolves "Invalid Serial Number" or "Invalid Machine Type" POST errors that appear when a new motherboard has not been properly initialized.
Check the digital signature. Right-click the .exe file, select , and look for the Digital Signatures tab. A valid file must show a certificate explicitly issued to "Lenovo" . Step-by-Step Installation Best Practices i7tm38us 1.90 version.exe download
Look up the prefix or code of the file. Most technical file names correspond to official releases from manufacturers like Lenovo, Dell, HP, or Intel. : Resolves "Invalid Serial Number" or "Invalid Machine
: 4-digit Machine Type number (found on the laptop's bottom case sticker). MMMM : 4-digit Model designation string. CC : 2-digit hardware Country procurement code. A valid file must show a certificate explicitly
The official distribution point for the i7tm38us utility has always been Lenovo's own servers. The official download links are: