Windows 10: PC couldn't start up after update

After my computer updated, it couldn't startup properly anymore. I tried different steps i read online but it won't restart properly. The latest I see now on the screen is asking me to enter my password which i couldn't remember anymore as I use PIN to start windows.Each time I ask it to resent for 'forgottenpasword' it comes back with the same message to enter my password.I've tried every password i could remember, it will say password not correct.What can I do. I use Hp all in one. Joseph D. A.

:)

 

Lumia 650, we couldn´t connect to the update service

Hi,

Have a lumia 650 with Version 1511, OS build 10.0.10586.494 is this the latest version?

When i check for updates i get this: we couldn´t connect to the update service, we`ll try again later..

I have internet connection via WiFi and a microsoft account set up.

 

"We couldn`t create a new partition or locate an existing one."

Try this:

Before you get to that message, press SHIFT + F10 to open a command prompt.

Run diskpart.
At the diskpart prompt, run these commands:

list disk

At this point you should see the SSD as disk 0. If it has another disk number, use that number rather than "0" in the next command.

select disk 0
clean
exit (to exit from diskpart)
exit (to exit from the command prompt)





That should clear the contents of the disk. The entire disk space should then show up in Windows setup as "Unallocated Space" as in the screenshot below.

 

Update KB4550961 couldn´t be installed

Hi! I´ve tried hard to install KB 4550961 unsuccessfully. Even run this or that in order to correct whatever the problem might be.

However, after restart it appears “Updates couldn’t be installed” on the screen. Running Scannow and Restorehealth as Administrator didn´t
work either.

I´ve also gone step by step thru “Fix Windows Update errors” steps 1 to 5. I´m reluctant to follow Step 6 Reset or Reinstall Windows –
Refresh is not included - because I´m afraid I might loss some stuff important, though I created a restoration point and a USB recovery drive, just in case.