How to recover Windows 7 MBR without a CD

I have actually been having fun with Ubuntu for a couple of weeks currently, and also I would certainly such as to change my computer system back to it is initial - manufacturing facility - defaults.

On the computer system I have a recuperation dividing (it is a netbook). I experienced the procedure of recuperation and also every little thing appeared penalty. Nonetheless, when I reactivate the computer system I'm offered with

grub rescue >

Now, my understanding is that when I mounted Ubuntu "alongside" it changed the MBR or something like it, with GRUB.

I've kept reading a variety of discussion forums, that I require to make use of a Windows Recovery Disk.

Below are my concerns:

a) I do not have a recuperation disk, I have a recuperation dividing - it is a netbook. b) I do not have an exterior cd drive.

What I do have is a USB key that has around 1gb of room on it.

Many thanks beforehand.

2019-05-13 05:50:52
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Answers: 1

install Ubuntu LiveCD on your pendrive, boot from your pendrive, open terminal and also type:

sudo apt-get install mbr
sudo install-mbr -i n -p D -t 0 /dev/sda

Replace /dev/sda with the name of your drive.

What parameters do (from man page):

--interrupt <mode>, -i <mode>

This alternative establishes the checklist of occasions which will certainly create the MBR to present it is punctual. Usage -i +<event> to add an occasion to the checklist or -i -<event> to remove an occasion from the checklist. Values of <event> are:

  • s-- A change or control key is pushed.
  • k-- A non change - like key is pushed
  • a-- The punctual is constantly presented.
  • n-- Never present the punctual (unless a mistake takes place).

-p <partn>, --partition <partn>

This defines the default boot field to load. Legitimate values of <partn> are:

  • 1, 2, 3, 4 The defined dividing number.
  • F The first floppy.
  • D The dividing noted with the bootable flag in the dividing table.

-t <timeout>, --timeout <timeout> This alternative transforms the moment which the MBR awaits prior to starting the default dividing to the value defined in 1/ 18 secs (approx). The maximum timeout that can be defined is 65534which has to do with a hr.

If mbr out repo you can download and install the Deb plan from here.

An additional method:

sudo apt-get install syslinux
sudo dd if=/usr/lib/syslinux/mbr.bin of=/dev/sda
2019-05-17 19:23:21