Mouse and keyboard input not working after windows 10 upgrade from windows 7.

I have reverted and upgraded 7 times.   Each time trying a different "internet fix recommendation."   So far I have spent a lot of time and had no luck.  My new keyboard gets delivered on Wednesday so I will try that rather than make another 7 attempts.   Hopefully Microsoft Keyboard/Mouse will work with Win 10.   So far those that have posted the brand of their problem keyboards and mice and motherboards have posted Logitech for the input devices and sometimes Asus for the motherboard.   That is also my set of devices.

I have had exactly the same problem but with both the touchpad and keyboard on the latest windows 10 update. In the end I had to roll back.

Curiously the keyboard and mouse functioned in the repair menus accessed via the F keys however once booted in windows 10 the touchpad and keyboard failed to work. I could only login to the system via the finger print sensor.

Windows booted but was unusable since all inputs failed. The only functioning button was the power button.

I tried booting in safe mode(every variant), doing auto repair, and in the end had to roll back to win 7.

Slightly concerned about re upgrading and having the same issue.

I have a Medion S4209 & after updating windows 7 to 10 had to hold fn key to get letters on laptop keyboard. Was

working with the numbers keypad ON . ie press l got 3.

Go into settings on main menu, devices,   mouse & touchpad  properties, click on additional mouse options.

Mouse Properties, click on Device Settings.

Disable Synaptics Touchpad on PS/2 - keyboards works correctly now.

Cheers

Same no joy with Logitech wireless keyboard/mouse and upgrade to Win 10 on Asus motherboard.   I tried all the above fixes including changing usb settings in bios and the best I could do is get into Win 10 after about 7 upgrades and roll backs once.   Then overnight when it went to sleep no joy again.

The most expeditious (saving time and spending less than $60) I have ordered a replacement Microsoft wireless keyboard/mouse combo.   I don't want to waste the time some of our colleagues have spent on this issue.   Remember when we upgraded to Win 7 and again when we updated to Win 8?   Both times it was months before Logitech could come up with a working device driver for the new OS.   Whether Microsoft is inserting malware to keep Logitech drivers from working or Logitech is simply woefully behind in building new drivers, doesn't matter.   Fact is the user gets the problem.   My new keyboard/mouse will be here tomorrow and I can forget this problem and go play golf today. 

I will keep the Logitech equipment and reinstall it in several months when the new drivers are ready.