| Issue | Likely cause | Solution | |-------|--------------|----------| | BSOD (0x133, 0x3B) | Incorrect touch report descriptor | Use original MS sample, don't modify HID descriptor blindly | | Driver not loading | Signature enforcement | Enable testsigning or get a valid EV cert | | No touch input after install | App not polling touch | Driver only injects; app must handle WM_TOUCH / WM_POINTER | | Multiple instances appear | INF installed device multiple times | Uninstall all, clean registry Enum\HID |
If the driver is locked, boot into Safe Mode and delete the file manually. vmulti.sys
Anti-cheat systems (EAC, BattlEye) often flag vmulti.sys as a potential cheat tool because it can automate gameplay via touch emulation. Many games simply block systems where vmulti.sys is loaded. | Issue | Likely cause | Solution |
Think of a bus driver as a traffic controller. vmulti.sys creates a virtual bus (a communication channel). It then "enumerates" (detects and lists) child devices on that bus. In the context of a Lenovo Yoga, the vmulti.sys driver might enumerate: Think of a bus driver as a traffic controller