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Installed the correct chipset? Or did you just upgrade and leave everything? Don't forget to download the input drivers too. For Windows 10.<br />
<br />
<a href="https://support.hp.com/us-en/drivers/selfservice/hp-prodesk-400-g3-microtower-pc/7638325" rel="ugc">https://support.hp.com/us-en/drivers/selfservice/hp-prodesk-400-g3-microtower-pc/7638325</a>
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Installed the correct chipset? Or did you just upgrade and leave everything? Don't forget to download the input drivers too. For Windows 10.

https://support.hp.com/us-en/drivers/selfservice/hp-prodesk-400-g3-microtower-pc/7638325 [https://support.hp.com/us-en/drivers/selfservice/hp-prodesk-400-g3-microtower-pc/7638325]

Rommel Betancourt

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Windows 10 management of USB 3 on &quot;older&quot; (pre-Win10) hardware can be flaky at best.<br />
If the <a href="https://downloadcenter.intel.com/download/22824/Intel-USB-3-0-eXtensible-Host-Controller-Driver-for-Intel-8-9-100-Series-and-Intel-C220-C610-Chipset-Family?product=65855" rel="ugc">Intel download</a> isn't working try their <a href="https://www.intel.com/content/www/us/en/support/detect.html?iid=dc_iduu" rel="ugc">web-based diagnostics tool</a> to see if there's a better recommendation.<br />
<br />
What's the error message in Device Manager?
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Windows 10 management of USB 3 on "older" (pre-Win10) hardware can be flaky at best.
If the Intel download [https://downloadcenter.intel.com/download/22824/Intel-USB-3-0-eXtensible-Host-Controller-Driver-for-Intel-8-9-100-Series-and-Intel-C220-C610-Chipset-Family?product=65855] isn't working try their web-based diagnostics tool [https://www.intel.com/content/www/us/en/support/detect.html?iid=dc_iduu] to see if there's a better recommendation.

What's the error message in Device Manager?

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open device manager - probably the usb is in error<br />
delete it and reboot - &nbsp;check if it works now
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open device manager - probably the usb is in error
delete it and reboot -  check if it works now

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Great advice John. All is working now.
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Thank you for the update and I was happy to help
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Thank you for the update and I was happy to help

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Hi I'm having issues with the USB composite driver in windows 10 pro on the following computer HP ProDesk 400 G3 MT. The problem occurred when I did a windows 10 upgrade from windows 7 pro. I've downloaded the drivers from both Intel and HP's website and still a yellow exclamation mark on the USB composite. Is there something I'm doing wrong?
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Hi I'm having issues with the USB composite driver in windows 10 pro on the following computer HP ProDesk 400 G3 MT. The problem occurred when I did a windows 10 upgrade from windows 7 pro. I've downloaded the drivers from both Intel and HP's website and still a yellow exclamation mark on the USB composite. Is there something I'm doing wrong?

USB Composite driver error

Windows 10 is a personal computer operating system featuring the "universal application architecture" (UAP); apps can be designed to run across multiple devices with nearly identical code, including PCs, tablets, smartphones, embedded systems, Xbox One, Surface Hub and HoloLens. Windows 10 also includes a virtual desktop system, a window and desktop management feature called Task View, the Microsoft Edge web browser, support for fingerprint and face recognition login, voice-based search (Cortana), new security features for enterprise environments, and DirectX 12 and WDDM 2.0 to improve the operating system's graphics capabilities for games.

Windows 10

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.