Windows can power down USB devices to save energy. This can result in performance issues while reconnecting the USB for touch. Please follow the next steps to prevent Windows from shutting down USB devices after inactivity:
Open Device Manager by typing "device manager" in the Start > Search panel
The Device Manager window will open. Expand the Universal Serial Bus controllers branch, then double-click the USB Root Hub device, and choose the Power Management tab.
Turn off the Allow the computer to turn off this device to save power by unchecking the box then click the OK button:
Repeat the step on each USB root hub or do it only for USB ports that you want to be permanently powered on. If you experience lost USB connections or power from a USB port to your auxiliary device, try the steps above then idle the device and wait for a few minutes to confirm that the problem has gone away