windows update

Hello everyone i have an older model Dell Inspiron. Updated windows 10 and now my login screen does’nt allow me to change account. There is no power option on screen. It is saying my password is incorrect when i know 100% its not since i just used it to login here. I dont know what to do. Please help

I too have a 6-year-old Inspiron and I'm not having any update problems on it, but I have had that "log-in" issue.  Try to re-type your password slowly and then hit "enter".  That has worked for me.  this is just one of the many "bugs" in v1709 of Win 10; however, I learned some good news yesterday from an Answer Desk (Microsoft's Paid support service) tech.  He told me that there is a whole new version of Win 10 coming sometime in May (which they are working on now) which, among other things, will address and repair the many bugs in "build 1709".  so I am going to just wait until this happens.  Strangely, however, it's my 3-year-old Dell Inspiron that is having the "Update Issue" and not my 6-year old model.  Go figure.  Apparently, according to the tech, some machines don't have the proper drivers installed to smoothly operate Windows 10 and this is causing problems with updates, but I'm not sure why.  That is above and beyond my pay grade.  But, again, the tech told me not to worry and just wait until sometime in May.  (That's when Bill Gates descends from the mountain with his new tablets!)   Take care everyone!

Thanks for the response. Update- i continued to force shutdown and then startup the computer until it didnt load correctly. This gave me the option to go to troubleshoot options and clicked the restart system and just re installed the whole windows 10 and this time it maintained integrity and booted up properly and this fixed my login issue however it wiped everything. I didnt have much on it but just an fyi for anyone who does this way.

From another thread: https://answers.microsoft.com/en-us/windows/forum/windows\_10-update/failed-install-2018-03-cumulative-update-for/140c7c68-8cd9-44fb-a9b7-bf3241846af5

Before installing KB4093112, KB4088776 has to be installed correctly first. Try installing KB4088776 first by doing this:

a) Search cmd in the Windows search bar. Right click on Command Prompt and click Run as Administrator

b) On the open Command Prompt window, copy and paste the commands (all at once) 

net stop wuauserv

net stop cryptSvc

net stop bits

net stop msiserver

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

ren C:\Windows\System32\catroot2 catroot2.old

net start wuauserv

net start cryptSvc

net start bits

net start msiserver

c) Download KB4088776 from https://www.catalog.update.microsoft.com/Search.aspx?q=KB4088776, and install it.

d) Restart your computer.

e) Do parts a) and b) again

f) Download the Delta update for KB4093112 from https://www.catalog.update.microsoft.com/Search.aspx?q=KB4093112, and install it

The procedure didn't work for me.  I had used it once before to fix this issue with an earlier update.

I'm not certain but I bet the Windows Update Troubleshooter does basically the same thing and it said it fixed everything but it didn't.  And I ran it twice and got the same results.

This sucks.  MS needs to fix this.  I have another HP Win10 desktop and it doesn't have this issue.