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Samsung NP54073C-A02AU CRASHED

My Samsung Laptop Model NP54073C-A02AU - DOES NOT BOOT. (no dvd)
It was working for some months on Windows 8 and crashed during an attempt to upgrade.
Windows 8 was pre-installed. The windows 8 sticker does not have a product key.
Samsung support say I have to contact Microsoft for the product key.
My plan was to download the windows 8.1 iso image; create a USB bootable stick; then try and install onto the Samsung.
I have had difficulty downloading and Im not sure this the best process anyway.

Ideally I would like to access the hard disk that does not boot and try and recover the product key.

Update: although windows 8 does not boot... I am able to get access to the recovery and tools options via the Function and F1 key.
I can use the DOS prompt option.
I cannot use the recovery option as nothing had been saved previously.
The "Refresh your PC" option appears to be working as dots are circling and
"Please wait" signals some hope.
I will leave this running overnight.

Please advise what my options if the PC does not reboot windows 8
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mattie13
Asked:
mattie13
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2 Solutions
 
nobusCommented:
i would backup the data first
you can do this by hooking the disk drive to a working pc - sata connection
or by booting into a live knoppix cd, and copying the data to an external drive
then do a factory reset :  http://www.isunshare.com/blog/factory-reset-samsung-laptop/
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mattie13Author Commented:
Thanks for the feedback nobus.
I was following a similar process to the Samsung advice i.e deleting everything and resetting to original windows 8 state when I received your advice.
So now I have windows 8 running and I would like to upgrade to windows 8.1.
Getting prompts that I can get a free upgrade to 8.1.
Following prompts takes me to windows store... but I cannot see any icon for windows 8.1 download.
Have you any advice for me to progress please ?
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nobusCommented:
not like that
post a picture of that screen, or a link, so i can see where you are looking
right now - i'm in the dark, without lamp, or crystal ball
but working together, we'll sort it out
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mattie13Author Commented:
Thanks for your feedback nobus.
I solved the remaining issues by following http://windows.microsoft.com/en-au/windows-8/update-from-windows-8-tutorial#start\


I didn't see the 8.1 update on the Store home screen, so I followed the advice at
http://windows.microsoft.com/en-au/windows-8/why-can-t-find-update-store

Once I installed the latest windows updates I could then see the 8.1 app in the store and complete the 8.1 upgrade by following the prompts.

Thanks for your help in the process.
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mattie13Author Commented:
Own comment selected as a part solution as indicated
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