| Symptom | Solution |
|---------|----------|
| Error 10 (Device cannot start) | Run cdc-acm.inf uninstaller from Xprog utilities folder, then reinstall FTDI driver manually. |
| Software crashes on "Connect" | Disable antivirus real-time protection entirely during use. |
| "Kernel driver not loaded" | You forgot to disable driver signature enforcement. Reboot → F7 as in Phase 1. |
| COM port disappears after sleep | Unplug/replug Xprog; better yet, disable sleep on your programming laptop. |
Once installed, a "better" install also means you configure the software for your workload. how to install xprog 555 on windows 10 better
Installing Xprog 555 on Windows 10 isn't a standard "next-next-finish" process. Due to its reliance on older USB drivers (FTDI, SiLabs) and kernel-level access for BDM/JTAG programming, Windows 10’s security features (Driver Signature Enforcement, Defender) actively fight the installation. Follow this battle-tested roadmap. Firmware check (very important for clones):
