If your screen shows an error after updating, you can perform a :

Choose the latest firmware version (often labeled with a "Hot" tag or the highest version number). Click and wait for the progress bar to reach 100%.

Some aggressive antivirus software mistakenly flags the update tool as a threat. Temporarily disable it if the download fails. Step-by-Step Guide to Update JDiag M100 Pro

The one provided in the box (or a high-quality data cable).

: Reading and clearing fault codes, ABS system testing, and CO idle speed adjustment.