Missing Visual C++ Redistributables or .NET 3.5. Fix: Install vcredist_x64.exe and vcredist_x86.exe (all versions from 2008 to 2019). Turn on .NET 3.5 via Windows Features.

: At least 30GB to 60GB of free disk space on the C drive to accommodate the large diagnostic database.

| Issue | Solution | |-------|----------| | | Reinstall driver in Test Mode; try different USB port (USB 2.0 preferred). | | ODIS freezes on startup | Run as Administrator; disable fullscreen optimizations. | | “No diagnostic hardware found” | Check Postsetup; re-run hardware configuration. | | Blue screen (BSOD) on connect | Driver conflict – uninstall other VAG drivers (e.g., older VCDS). | | Slow communication | Disable power saving for USB root hubs. |