Disable Device-Selective-Suspended in Win11 for USB-Serial adapter Follow

Device-Selective-Suspended is added as an option for USB-Serial adapter in Win11. 

If you see the following error in EZMQC for UltraScan Pro or UltraScan Vis when EZMQC idle for a while and have to reconnect sensor or restart EZMQC to reestablish the connection, the device-selective-suspended might be enabled in your windows.

Please follow the instructions below to disable device-selective-suspended.

• Make sure that the usb-serial adapter and the serial cable are connected correctly between PC and the instrument.
•  Go to PC Control Panel/Device Manager, check Ports(Com&LPT), and find the com port number of this usb-serial adapter. E.g. The example in pic below is com4.

• In Windows search box, search and open ‘Registry Editor’, go to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB. Right click on USB and click Find. Search for the com port number of this USB-Serial adapter that you find in device manager above.
• 

• In the right view aera of Registry Editor, you will see all the options listed for the USB-Serial adapter. When the value is set to 1, it means that selective suspension of USB devices is enabled, allowing Windows to selectively suspend the operation of certain USB devices to conserve power when they're not actively in use. When the value is set to 0, it means that selective suspension of USB devices is disabled, and Windows will not selectively suspend USB devices.

After applying this change in registry edit, the USB-serial adapter should work correctly to keep EZMQC and the instrument connected.