Windows 10 Dell Optiplex

I have had great success in this forum over the years - I repair computers for seniors.
Have a Dell Optiplex which does not respond in any way to the mouse of keyboard - both are usb. I have connected known good mice, kb - both wired and wireless. Each time the computer indicates it found new hardware - prepares then indicates it is ready - but nothing. I have seen a few things on the internet but they require accessing safemode which I cannot do - since F8 and the like cannot be inputted. The wired mouse (optical) glows red for about 6 secs then nothing. Model number is 9010 - nice unit.

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Reply to: Windows 10 Dell Optiplex
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Clarification Request
Does it have PS2 connections?

There were some rare odd Dells that didn't really do USB keyboards. Try PS2.

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Dell 9010 USB Keyboards

You were 100% correct - the PS2 worked perfect. Could the issue with the previously working wireless kb&m be that the KM632 has no drivers for Windows 10? Could only find the drivers for 7 & 8 on the Dell website.
Thanks again - I frankly was skeptical about the old PS2 working.

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Could be a few things

Dead USB ports, BIOS setting needs to enable legacy and/or keyboard mouse support and motherboard chipset driver issues (does not apply to getting to the BIOS issues.)

I've had Dells that were picky about USB keyboards. These were decade old machines.

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