## About USB drivers

When connecting this device to a Windows PC via USB, installation of a USB driver is not required.

In this case, the standard Windows USB driver will be used.

It is also possible to install and use the USB driver included with the communication command manual.

If you choose to use this driver, please turn off the memory integrity feature of Windows security.

## Standard USB driver provided by Windows

If you are using the device without installing the USB driver, please ensure that the software version of this device is 1.24 or later. The stability of communication using the standard Windows USB driver has been improved.

## USB driver included with the communication command manual

If you are using the USB driver included with the communication command manual perform the following procedure to install the USB driver.

Download now

HiokiUsbCdcDriver.msi

Installing the USB driver included with the communication command manual will not allow you to change the memory integrity setting of Windows security features to "on".

If the memory integrity of Windows security features is set to "on" and you have installed the USB driver included with the communication command manual, communication with this device will not be possible. You will need to either turn off the memory integrity of Windows security features or uninstall the USB driver included with the communication command manual.

## Installation of the USB driver included with the communication command manual

Perform the installation with administrator privileges.

1. Run HiokiUsbCdcDriver.msi

Depending on the environment, the dialog box may take some time to appear so please wait till it does so.

2. Click [Next].

3. Click [Next].

When you want to change the installation destination.

Click [Browse...] to change the folder to install into.

Normally, there is no need to change.

4. Click [Next] to start installing.

Installing

When a dialog box requesting your permission to continue the program appears, click [Yes].

Sometimes another dialog box requesting your permission to install the software may appear. When it does, check [Always trust software from "HIOKI E.E. CORPORATION"] and click [Install] to continue.

5. When installation is completed and the dialog box appears, click [Close] to exit.

This completes the driver installation.

## Uninstallation of the USB driver included with the communication command manual

When the USB driver is no longer needed, uninstall it with the following procedure.

1. Uninstall "HIOKI USB CDC Driver" from the Apps & features section in Windows Settings.

2. Delete "grusbcdc.sys" located in C:\Windows\System32\drivers.