Windows 10: Keyboard and mouse not recognized after boot-up!

it appears that the windows update has made the computer unusable.
It is unclear what the update did?
Did it corrupt the operating system, the drive file structure, the registry, the boot partition?
So there are various troubleshooting steps and all are trial and error as so far there is no established fix.
The earlier windows RE commands were to revertpending actions, fix the operating system, fix the drive file system.
The steps that were not yet performed were to fix the boot and to fix or repair the registry.
The above commands are the methods to fix the boot.
After that will be the registry fix.
The steps are easier to post if there are images of the commands and results from the previous steps.

 

Thanks, but as I mentioned earlier, I did this power on/off method four times, and it did not take me to the recovery options menu--went straight to the desktop.

 

These commands can be ran in the Windows PE (Windows 10 iso advanced troubles shooting menu)

 

OK, we don't know exactly what the update did, but the PC is in fact booting normally, so it's not clear to me why we'd be using the boot commands to "fix" the master boot record and so forth. And while there is no "established fix", we do know that in similar cases (reported here and elsewhere) uninstalling a particular, recent update resolved the issue. So, given that the PC is booting normally and given that the uninstalling of a particular, recent update resolved the issue, it seems to me that the these other approaches are not especially apt. Perhaps I'm wrong about this, but I am reluctant to proceed with this course of action at this point. And I'm still not seeing the relevance of the "dism /image:c:\ /cleanup-image /revertpendingactions" command.

 

Okay. The only other option that could be worth a shot is a registry repair.
Other than that you could attempt boot rescue or wait for a Microsoft update.
Boot rescue gives you many options and @dalchina knows it well.
The Registry method either works or it doesn't.

 

When you say "boot rescue", are you referring to a bootable WinRE disc?

 

These links may have some useful information or tools:

Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums
Backup and Restore with Macrium Reflect Windows 10 Tutorials
Enable or Disable Windows Update Automatic Updates in Windows 10 Windows 10 Tutorials
Hide or Show Windows Updates in Windows 10 Windows 10 Tutorials

 

I am not following this discussion in detail, so maybe what I say is nonsense for you. I notice that the topic changes from difficulties in the bios screen to difficulties with a Windows update. I donot see why a Windows update caused your problems with mouse and keyboard when in the Bios. At my PC both are already activated during the Bios startup.
Once I had serious difficulties with booting, and I had to go to a repair shop. It turned out that the bios firmware was corrupted and they flashed a new -and even more recent- bios firmware. Thereafter, everything worked fine again.

 

The main problem from the beginning has been that my USB keyboard and mouse had suddenly become non-funtional. My problem accessing the BIOS was secondary and was resolved a few days ago. The main problem, which we now know is the result of a recent Windows update affecting me and many others, persists.

 

A Random thought, try plugging a second mouse into another USB port after the system is up and running.

 

Still my question: are mouse and keyboard now functional when in the bios? If not, can you then expect they become functional during Windows boot?

 

Yes, they are functional in the BIOS; if they (or the keyboard, at least) were not, I wouldn't have been able to get into the BIOS in the first place, as the F2 key function is required for that. It's only in Windows that the keyboard and mouse are non-functional.

 

Thanks, I tried that, but it did not work.

 

Does the mouse go off if you are in safe mode? The normal fix for this if you can't get in via remote desktop is to let it boot into the O/S then power down by holding in the power button for 5 seconds and then reboot, when you have done this 3 times you will get the recovery options where if you go into the advanced recovery you should be able to either do a system restore or boot into safe mode. Usually in safe mode you are running with the default drivers (not the ones that you get when you are running Windows normally so your mouse and keyboard should work at that point). When in there you can get to Programs & Features >> View Installed Updates and then uninstall the KB4074588 update and then reboot and all should be well.

 

Thanks, but as I mentioned earlier, the power on/off three times method does not work on my PC. I've tried it a few times in the last couple of days, even doing it four times (as a Dell tech suggested to me yesterday) instead of three, and it still just boots straight to the desktop.

I can, however, use the bootable disc created by Msft's Media Creation Tool for Win 10 to access troubleshooting tools, including System Restore (which won't work in this case---more on that momentarily) and the Command prompt. As I mentioned in a previous post, when I tried to open System Restore from the bootable disc, I got an error message telling me that I needed to specify a particular Windows installation, restart my PC, etc., which doesn't make sense in my situation. And today, another Dell tech walked me through a process using the Command line (accessed from the same bootable disc) that was supposed to list recent updates and then allow me to uninstall the problematic update, but that did not work, either, because the problematic update was not listed, and another command the tech tried in order to work around that problem did not do what was expected, either.