There are three primary ways to resolve this issue, ranked from easiest to most advanced.
| Error | Likely Cause | Solution | |-------|--------------|----------| | Code 39 | Driver not digitally signed | Reinstall with signed version or use advanced startup to disable signature enforcement (temporary) | | Code 10 | Device conflict or corrupted driver | Uninstall driver, clean registry, reinstall using latest known-working INF | | BSOD (IRQL_NOT_LESS_OR_EQUAL) | Faulty memory access in driver | Remove driver, replace hardware | | No video in OBS | Wrong DirectShow filter selected | Select 鈥淯SB Video Capture Device鈥� instead of 鈥渕camvusb7鈥� if both appear | mcamvusb7 sys windows 11