Product Manuals

​Download the manual by clicking on the relevant product:

• Comet USB Manual

• Comet Serial Manual

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Drivers

Drivers for the Comet USB:

• Windows Vista/XP drivers

• Windows 7, 8, 8.1, 10 & 11 drivers

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There are short YouTube videos providing help with driver installation:

• Windows XP

• Windows 7

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Additional Windows 10/11 Driver Installation Help

A recent Windows update forces driver signing which prevents Windows 10 and Windows 11 assigning the COMET USB driver. This is signified by a yellow exclamation mark in device manager against COMET USB.

 

To enable newer variants of Windows to install the driver, you need to disable device driver signing by following the instructions below.

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Disable Device Driver Signing From Windows Menus

• Select the “Start” button.

• Type “startup”.

• Select “Change advanced startup settings“.

• Select “Restart now” under the “Advanced startup” area.

• Select “Troubleshoot“.

• Select “Advanced Options“.

• Select “Startup Options/Settings“.

• Select “Restart“.

• A menu will appear where you can press “7” on your keyboard to choose “Disable driver signing enforcement“.

 

Now Device Driver Signing should be disabled, allowing you to install any driver you like in Windows 10 until you reboot.

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Permanently Controlling Device Driver Signing From a Command Prompt

It can be turned off and on permanently with the following commands however, our network is controlled domain level so I am now looking to enable as part of group policy.

• Click the “Start” button.

• Type “command“.

• Right-click on “Command Prompt” and select “Run As Administrator“.

• Do one of the following:

• 1. To disable device driver signing, type “BCDEDIT /set nointegritychecks ON” then press “Enter“

• 2. To enable device driver signing, type “BCDEDIT /set nointegritychecks OFF” then press “Enter“