Look for a command prompt window showing "Drivers successfully installed" or "Found 1 device." 3. Check for Antivirus Blocking Antivirus software often deletes the multikey.sys driver.
Alternatively, use the for a wizard-guided installation. Reboot your machine. Long-Term Recommendations
: The virtual key relies on the Sentinel HASP runtime. Download the latest "Sentinel HASP/LDK Driver" from the Thales Sentinel Driver Download page to ensure compatibility with recent Windows updates. Repair Corrupt User Profiles mastercam virtual usb multikey not working
Hold the key while clicking Restart in the Windows Start Menu.
Once your computer boots into Windows, check if Mastercam opens. Look for a command prompt window showing "Drivers
Before fixing the problem, you must understand what you are dealing with.
If using manual .inf install:
Do you see a next to the driver in Device Manager ? Share public link
Windows Defender flags multikey.sys as HackTool:Win32/Keygen . This is a false positive because the driver behaves like a dongle emulator. Reboot your machine
A：很可能是Windows Update自动安装了更新，破坏了驱动。请卸载近期的Windows更新，并重新安装驱动。
Before diving into complex fixes, confirm the issue is specifically the Virtual USB Multikey.
