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Windows 7: Deleted Entire HDD, Operating System Not Found - Wont boot from CD

20 Sep 2015   #1

Windows 7
Deleted Entire HDD, Operating System Not Found - Wont boot from CD


I hope somebody on this knowledgeable forum can help me after a very silly mistake I had committed when trying to reinstall/reformat my friend's Samsung R519 Laptop and do a clean install of windows 7. I had used the tutorial below, using diskpart to 'clean all'

How to Do a Clean Install of Windows 7 How-To Geek Forums

DiskPart <ENTER>
list disk <ENTER>
select disk 0 <ENTER>
clean all <ENTER> (Will Take a While)
create partition primary align=1024 <ENTER>
format fs=ntfs <ENTER> (Will Take a While)
assign <ENTER>
active <ENTER>
exit <ENTER>
exit <ENTER>

The problem there were two disks listed - disc 0 and disc 1 - I completed the steps above but stupidly ran the clean all steps for both discs and now I think I had managed to delete the entire HDD and now it won't boot from CD. The error comes up as 'operating system not found'.

I can access the BIOS on F2 but cannot access the recovery console on F4 - it's probably been deleted. I have tried booting from various recovery discs including the windows 7, a system repair disc (created from a different laptop), and the hiren's boot cd. Nothing will load from the CD-ROM as it says the same error - Operating system not found.

At some point I can remember it saying bootmgr is missing, but after attempting a few things I read up on various forums I don't receive this error anymore. I'm thinking there must be a way to load up whatever is misisng from scratch as everything is deleted. I have selected CD-ROM in the boot priority and also tried disabling the HDD to force it to boot from CD - but still same error - Operating System Not Found.

Any help is greatly appreciated. Many thanks

My System SpecsSystem Spec
20 Sep 2015   #2

Win-7-Pro64bit 7-H-Prem-64bit

Hi and welcome to SevenForums,
Unfortunately disk 1 was probably the installation media if it was connected when you accessed disk 0 and clean all

I'd guess but seems you need another installation disk to boot to
Clean all is not recoverable it marks every cell with 0's
My System SpecsSystem Spec
20 Sep 2015   #3

Windows 7

Thanks ThrashZone appreciate you coming back to me
I will post my solution for other users out there maybe experiencing similar problem this is how i resolved it.
I have eventually managed to solve this problem which was driving me crazy with a simple solution by booting Windows 7 from USB instead. I then used Command Mode, DiskPart to activate the correct partition which were fortunately both listed and then repaired bootmgr with few codes on the same command prompt.. This seemed to do the trick following the steps here:
How to Fix Windows 7 When It Fails to Boot

Following this a clean install of windows 7
Clean Install Windows 7

My System SpecsSystem Spec

20 Sep 2015   #4

Windows 7 Pro x64 Windows 10 Pro x64

A Windows 7 install disc is a dvd not a cd, if you only have a cd rom, that`s why it won`t boot from the disc.

Either that or you don`t have the cd/dvd rom listed 1st in the boot order.
My System SpecsSystem Spec

 Deleted Entire HDD, Operating System Not Found - Wont boot from CD

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