Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: accidentally formatted all three drives, cant reinstall windows

04 May 2012   #1

windows 7 64bit
accidentally formatted all three drives, cant reinstall windows

i was trying to reinstall windows but have never done it before and messed everything up.

i booted from an install disk and things seemed to be working but i couldn't add any programs, i saw that i had accidentally installed windows in the recovery C: drive and had no space left to add programs. i went back to the boot menu and used the format tool to erase windows seven from C:, i wasn't paying attention and used the format tool on all three of my drives, D: and C: and the OEM one. i understand what i did was incredibly stuipid but if anyone can point me in the right direction with what i need to do do put those files back on my computer i would appreciate it.

my computer is a dell 1555 and the operating system is home premium 64 bit

everytime i try to install windows from the disk i end up with the "bootmgr missing" message

My System SpecsSystem Spec
04 May 2012   #2

Windows 8 Pro (32-bit)

Just so you know for future reference: in-place reinstalling creates a windows.old folder in the root of your boot drive, which you can easily delete to clear up space.

That being said: recovering your boot drive may be unfeasible, but you should be able to recover most of your data from the other drives. I don't know which program to use though.
My System SpecsSystem Spec
04 May 2012   #3

Windows 10 Pro x64 x3, Ubuntu

As you have a dell system, you could try contacting them directly and asking about a set of recovery disks. Dell always used to be able to provide these which will boot up and put your system exactly back as it was when shipped. They may charge a nominal handling fee for the disks but they could be the only sure way to get the system back with its recovery partition and system/data setup
My System SpecsSystem Spec

04 May 2012   #4

MS Windows 7 Ultimate SP1 64-bit


Barman has given you some excellent advice.

Dell's support in this area is exceptional.
Now let me dig up the link you need.

Lost your Windows discs? How to get replacement media, legally | ZDNet
My System SpecsSystem Spec
04 May 2012   #5

Windows 7 Ultimate SP1 64-Bit

If you live in the United States you can request a recovery disc from Dell.
My System SpecsSystem Spec
04 May 2012   #6
Night Hawk

W7 Ultimate x64/W10 Pro x64 dual boot main build-remote pc W10 Pro x64 Insider Preview/W7 Pro x64

Welcome to SF! trentongm

Can I ask what type of 7 disk you used for the new install? You apparently installed 7 onto the factory hidden recovery partition often seen at the front end of the drive unlike other brands where that is seen at the back end instead as the Windows installer will generally look for the first primary type partition.

I think we can all agree obtaining a set of recovery disks or disk for shipping costs only being a customer is the first best option. If however the disk you have there is a retail disk of the exact same edition and 32bit or 64bit Windows as the system came with you would simply enter the product key found on the sticker attacked to the back of a desktop or bottom of the laptop there to see Windows activated.

What that means if the pc came with the 32bit 7 Home Premium you would need a 32bit 7 HP retail disk to replace the loss there and leave the prepackaged softwares bundled out. The device drivers for chipset, video, onboard sound if no separate expansion card would all need to be downloaded separately of course from the Dell support site or other.

The Dells generally come with an option at post time for seeing a full restoration however by pressing a key combination without the need for a recovery disk. Unfortunately only the recovery partition was lost during the bad install you saw there where now simply wiping the drive clean for one single primary for 7 would be a thought to consider.

The wipe of the drive would mean the hidden recovery partition is removed recovering that drive space as well as the option for allowing the 7 installer to create a new 100mb System Reserved boot partition in it's place or creating the single primary ahead of time. Before deciding however you will want to review the guide on how to perform a clean install of 7 seen at Clean Install Windows 7

You will want to get familiar with the steps for installing W7 regardless of which option for getting 7 back on you decide to go with.
My System SpecsSystem Spec
04 May 2012   #7
Microsoft MVP


Everything you need to Clean Reinstall - Factory OEM Windows 7 with the Product Key on COA sticker is in the blue link.

The error you are getting "Bootmgr is missing" is because it's attempting to boot the HD which has been deleted so there is nothing to boot. You must boot the DVD by setting it first to boot in BIOS or tapping at boot the Dell F12 one-time BIOS Boot Menu key.

I would unplug all other HD's except the one you want to install upon, follow the steps in tutorial to delete all partitions, then click Next for the installer to create and format the install partition and begin install.
My System SpecsSystem Spec
04 May 2012   #8

MS Windows 7 Ultimate SP1 64-bit

The install disc is from Microsoft, from Dell or from where?

If the the install disc is a disc you made using a Dell option, can you tell us what that option was.
My System SpecsSystem Spec

 accidentally formatted all three drives, cant reinstall windows

Thread Tools

Similar help and support threads
Thread Forum
Accidentally formatted brand new HDD to GPT instead of MBR
Alright. So here's my giant-ass screw-up of the year. I have a computer that is over 5 years old - essentially a stock Dell Studio XPS 8100 (desktop). The hard drive, which I honestly am not surprised about, gave me a warning that it was likely about to fail. Not being an idiot, I went and got a...
Backup and Restore
Accidentally formatted system reserved partition and window won't boot
Hi, Let me explain what happened briefly. When I tried to install my third OS in my laptop which is a linux base OS and I accidentally formatted system reserved partition and my second OS which is a linux base OS also. Since then, I can never boot window 7 professional 64bit which is my...
Installation & Setup
Accidentally formatted UEFI System Partition, now Windows won't boot.
Is there any way I can restore what was in that partition?
Installation & Setup
Accidentally formatted c: and unable to install windows due to GPT
I have bought a new Samsung laptop. Specs: Model - NP550P5C-S05IN Memory - 8 GB Hard disk - 1 TB SATA II Graphics - 2 GB NVIDIA GeForce I was trying to install Windows 8 enterprise. My lap was already running some basic version of Windows 8. I booted from usb and without reading the...
Installation & Setup
I accidentally formatted my hard disk drive .....
HI I accidentally deleted one my hard disk drive using "mini tool partition wizard"(still remained unallocated) , and immediately i selected partition recovery wizard in that software and scanned the entire hard disk and it showed the files exactly how they are in my formatted drive looks ..when...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:58.
Twitter Facebook Google+