PC won't boot after lastest Windows 10 update

We had to play with it until we could get to the update history page where I deleted the 2020 May update,.  it is working somewhat now.  I certainly won't opt to put it on mine. It is impossible to get to the real techs, sometimes.if I were suspicious I would think they throw stuff out there just to let us figure it out for them, but that would be cruel, wouldn't it?  sorry about your lost data, Don't know what to say.

Thanks for the kind words.  I wound up shipping it back to Dell.  In addition t WIN10 update issues I had a hard disk error.  Two weeks there but seems to be working fine now.  I gotta say I never had these problems with HP notebooks.  Used them the last 20+ years as personal PC's.  This is my first Dell.  I know a lot of folks had problems with that WIN10 upgrade but I'll have to see how this Dell works in the long term.  Accolades for the help.  Sam

Hi GavinCarroll

I am Vijay, an Independent Advisor. I am here to work with you on this problem.

A. Try to boot into safe mode

Power ON your computer and as Windows / manufacturer's Logo appears, Power OFF - Repeat 3 times

Now your computer will go into Advanced Recovery Environment

Advanced Options > Troubleshoot > Advanced Options > Startup Settings > Restart

Press 4 or F4 to enable Safe Mode (5 or F5 to enable Safe Mode with Networking)

Log in once Windows starts in safe mode

See whether you able to login. If yes, come out of this and start normally.

If you are not able to boot like above, You will need to boot through a Bootable USB drive. You will need to create this on another computer which is working - https://www.tenforums.com/tutorials/2376-create...

How to Boot from a USB Flash Drive in Windows 10 - https://www.tenforums.com/tutorials/21756-boot-...

B. Another option when you are in Advanced Options in previous step is to choose (Note - You won't lose any files in this step)

1. System Restore - This will restore your system to a point when things were working fine.

OR

2. Startup Repair - Startup Repair upgrade fixes all Windows errors and retains all files, applications and settings.

C. Penultimate option could be Reset this PC.

In Step A > Troubleshoot > Reset this PC - Keep my files and Remove everything. Choose this carefully as most likely you would like to keep your files.

All apps will be removed and windows will be reinstalled.

D. Last option could be a clean Install. This is the best method to perform a clean install of Windows 10. (If you want to rescue your files, there is a section Rescue Files when Windows Won't Start)

https://answers.microsoft.com/en-us/windows/for...

If you want a very lightweight guide - Start fresh with a clean installation of Windows 10

https://www.microsoft.com/en-us/software-downlo...

Disclaimer - This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

I wound up sending it back to Dell.  Working fine now but lost a good deal of data.  I'm going to file your suggested fix for any possible future use, thanks.  Sam

To all who kindly responded to my problem.  THANK YOU!  I'm saving all your suggestions for any possible future use.  I wound up sending the unit back to Dell.  They did find I had a bad hard disk in addition to the issues surrounding the upgrade(s).  Hopefully no more future problems!  Sam

Good luck.