If you must use Windows 11:
Windows 10 is notoriously strict about "Unsigned Drivers." Since most OP-COM interfaces use a generic FTDI chip, the OS often blocks the drivers required for the software to talk to the cable. The Driver Solution opcom 199 software windows 10 new
Avoid: “FTDI FT232BL” (older, blacklisted). Expect to pay $55–$90 for a quality clone. Genuine OPCOM (from Opel dealer tool suppliers) costs €400+ but includes lifetime support. The Ultimate Guide to OPCOM 199 Software for
To make the 1.99 software work, you must . Go to Settings > Update & Security > Recovery . Under Advanced Startup , click Restart Now . click Restart Now .