Hello and welcome to just answer.
PS2 devices are usually only recognized at intial boot up.
But USB devices should show up right away.
The PS2 device should work if you have it plugged in, and do a reboot.
does your keyboard have any lights on it.....like when the CAPS lock is on, or if the SCROLL lock is on? DO they work?
Did you istall the drivers in COMPATABILITY mode for the version of windows its designed for? Are you using legitimate Windows 10 drivers for tha USB keyboard?
Oh, so it was working, and you didn't change anything, and it suddenly stopped working?
Very interesting, do you have any other USB keyboards you can try? Could it be, that his Corsair keyboard is starting to fail?
This could be a bug, and may need to have a patch issued.
As there is no reason, and no places to check, that you have not already.
I suggest you report this to MS. YOu can roll back your upgrade? You can use the ON SCREEN KEYBOARD? Or wait for MS to respond?
And that is exactly sounding like a bug to me. On and off, and diff times.
Win10 is still new, and without reporting, they cant fix it
Like I said, there isn't any other places that can be checked that you already did....the keyboard is a VERY simple onnection, as such is VERY automated. Many of the processes cant be checked.
the keyboard is IRQ 0. and shoul take command over EVERYTHING. and if it is working PRE login, but not POST login. a windows process has stopped it somehow
YOu can try a different keyboard....again. Or keep trying to install, and uninstall the USB.
You can try rolling back, restore point?
Device Manager - > Go to Properties of the keyboard ( standard keyboard ( PS / 2 ) - > Update Driver - > Browse my computer for driver software - >Choose from a list of device drivers on my computer - >Uncheck " Show compatible hardware " - > Select just any driver - >for example HID Keyboard - > then restartNow do the same again all over again - > but chose the correct driver (PS / 2 standard keyboard)
Some things work for different users.....I really think theres more work that needs to be done by microsoftfor Win10.
Many MANY users are complaining of keyboard issues. Some are EXACTLY like yours. Many are still unsolved.
The issue you are describing is highly unusual. Device drivers in each environment should be entirely independent and have no effect on each other. My only guess as to what could cause such behavior is that the devices are currently connected to USB 3.0 and somehow the USB 3.0 chipset driver in Windows 7 has become corrupted or failed. This would also explain the lack of support in the recovery media which also does not have USB 3.0 support.You could try to create USB recovery media in Windows 10 and boot to that. You could also try relocating the connections for your keyboard and mouse to a USB 2.0 port. Otherwise you should report this malfunction via the Feedback app to inform Microsoft of the error and post the details of your configuration here for other users including make and model of keyboard and mouse, make and model of the computer or its components, and the version of drivers used for USB, keyboard, mouse, chipset, etc.
Unfortunatley I do not think so.
But I suppose it couldn't hurt if you are willing to try.