My laptop is displaying windows could not complete installation.

[Realone1]

Product name : HP 15 

Error message : windows could not complete installation.

How the problem occurred : I wanted to reset my pc but couldn't reset showing a message "no changes were made" but unfortunately when I restart my p.c I saw a message saying " windows could not complete installation."

[Lil_Boy_Blue]

Hi

What kind of reset?  What method did you actually choose??

Back to Factory Fresh, wiping all data, is repeatedly pressing F11 at power on.

[Realone1]

I pressed the power button and hold the f11 and Click the trouble shooting option to reset my pc and I repeated the same method some minutes ago but what am seeing is different... I saw "you need to sign in as an administrator to continue, but there aren't any administrator account on this pc"...Pls help out cos I don't want to lose all my personal files 

[WAWood]

@Realone1 

You do know a Reset will erase all your personal files -- as @Lil_Boy_Blue mentioned -- right??

If you keep forcing this, you'll lose everything.

[Lil_Boy_Blue]

So can you make a Recovery/Repair/Rebuild/Re-Install DVD/USB by having access to another PC?

https://www.microsoft.com/en-gb/software-download/windows10

Then boot from it and attempt to recover your files.

This First part only works when a valid Recovery Partition is enabled.
If it displays an error message then move onto the Second part,
OR if you have data you wish to try and save using the XCOPY command.
Then create your own Repair/Recovery/Rebuild/Re-install media or buy a set from HP.

Turn off the computer.

Disconnect all connected devices and cables, Media Drives, USB drives, printers, & faxes.
Remove media from internal drives, and remove any recently added internal hardware.
Do not disconnect the monitor, keyboard, mouse, or power cord.

Turn on the computer and repeatedly press the F11 key, about once every second,
until the Choose an option screen is displayed, and then continue.

On the Choose an Option screen, click Troubleshoot, and work your way through the screens.

Second Part:-
This may require another PC. Find and Download your .iso from…
W8.x and W10 should activate automagically from their embedded licence key.)
https://www.microsoft.com/en-us/software-download/windows10

Expand/Extract/Burn the iso Image onto a DVD/USB as needed.
Microsoft’s Creator Tool will make the required DVD or USB.

Even though it has NO actual HP software/drivers included, you may be able to
XCOPY the C:\Users\* area onto a ‘large’ USB stick, via the Command Prompt.

You’ll need to try various drive letters; D:..-..Z: until it’s matched - could be G; mine’s S:

C:\>XCOPY C:\Users\* S:\ /e /i /h (then files like those 3 listed below get copied over)

C:\Users\desktop.ini
C:\Users\All Users\agent.1509128044.bdinstall.bin
C:\Users\All Users\HP Deskjet 2540 series\Help\flash\zoom.swf

Then you can try System Recovery Options / Advanced Options shown in the screenshots.
NB: - W10 Begin with the Automatic Repair, then Startup Settings etc.

From either the C:\ or the X:\ prompt try the following

cd boot
bootrec /FixMBR
bootrec /FixBoot
bootrec /RebuildBCD

[Realone1]

Thanks but am unable to access the prompt command on my PC...what I later did was system recovery and with dat all my files was Erased  and reinstall the software by itself...