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- HP Community
- Desktops
- Desktop Video, Display and Touch
- USB ports (mouse and keyboard) not working. Computer not rec...

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08-17-2020 03:03 AM
USB ports are not working. This has meant both the mouse and keyboard cannot be used. But a phone is able to charge via USB. I urgently need help here. I am not able to do anything as the keyboard is non-operational.
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08-18-2020 07:48 AM - edited 08-18-2020 07:49 AM
That model has PS/2 ports for a keyboard and mouse, as indicated by item #4 and #12 in this picture of the rear of that case
HP ProDesk 400G3 Microtower
Use a PS/2 keyboard and mouse. They will be recognized without the USB drivers.
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08-17-2020 05:17 AM
There are many models in the HP ProDesk line. Since Windows 7 is listed as the OS, it most likely is an older model. Please post a complete model number for any meaningful help.
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08-18-2020 04:36 AM
Was this actually working in the past or is this a new install of Windows 7?
With none of the USB ports not working, it sounds more like the drivers are not installed.
Here is a list of all the drivers for Windows 7 64bit for that PC
https://support.hp.com/us-en/drivers/selfservice/hp-prodesk-400-g3-microtower-pc/7638325
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08-18-2020 04:50 AM
It has been working. I actually first installed Windows 10. If all drivers are not installed, how come am able to charge my phone using a USB cable?
Kindly show me how I can install the drivers without keyboard and mouse. There's no way of interacting with my PC at the moment.
08-18-2020 07:48 AM - edited 08-18-2020 07:49 AM
That model has PS/2 ports for a keyboard and mouse, as indicated by item #4 and #12 in this picture of the rear of that case
HP ProDesk 400G3 Microtower
Use a PS/2 keyboard and mouse. They will be recognized without the USB drivers.
I'm not an HP employee.
Did this message answer your question? Please indicate below as an Accepted Solution!
Did you find this message useful? Click on the "Was this reply helpful" Yes button.
08-21-2020 12:32 AM
Thank you old man. The ps/2 devices have worked. However, suppose I wasn't able to get myself ps/2 mouse and keyboard? Could it be that it's known that USB drivers would not be there? My PC for example, did not come with ps/2 devices. The dealer didn't supply those, but USB devices.
08-21-2020 04:50 AM - edited 08-21-2020 04:56 AM
Since Windows 7 was being installed, it does not contain some of the hardware drivers that the newer computers use for USB ports. Many of the new hardware builds are using USB 3.0 which Windows 7 does not recognize. You can load drivers into the Windows 7 install media to allow those, but it is more difficult. Windows 10 is more hardware friendly in those regards.
It is similar to the WinXP install media that did not recognize SATA drives, when SATA came out. The drivers had to be on a floppy disk or slipstreamed into the WinXP install media CD.
I'm not an HP employee.
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