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My computer is a (brand new) PC notebook, without a CD drive running Windows 7. I followed this page to install from USB:

The installation went well and i am using Ubuntu now (v. 12.04 i believe)

I want to be able to dual boot Ubuntu and Win7 The problem is that the disc partitioning during the Linux install caused a problem with Windows, caused some problem with windows, and windows can no longer boot when i choose it at the GNU GRUB screen.

When i restart my computer i can successfully boot Linux, but not Windows 7. At the GRUB screen - if i run Win7 normally, it freezes, shows a blue screen, and returns back to GRUB - if i run Win7 recovery, i dont know how to access the files that i need in order to run windows again, so nothing helpful happens.

Can you please tell me what i would need to do(or link a guide) in order to run Windows again. (Windows and Linux is preferable, but if thats impossible going back to only Windows will help too)

Im guessing the easiest thing to do is just to reinstall both OS, or is there anyway to undo the partition i made during the install?


share|improve this question

There is no way to undo the partition changes to Windows. You will have to reinstall or recover Windows, then reinstall Ubuntu.

First, try running Boot-Repair(info) and see if this helps. To run this:

  1. Boot from a Ubuntu live CD or USB.

  2. Type these lines in the terminal one line at a time.

    sudo add-apt-repository ppa:yannubuntu/boot-repair
    sudo apt-get update
    sudo apt-get install boot-repair
  3. Search for Boot-Repair in the Dash and launch it.

enter image description here

To fix your computer with Boot-repair, simply click the "Recommended Repair" button. If it worked, you are done.

If Boot Repair didn't work, run a repair with a Windows Recovery CD (ask for one from your PC manufacturer).

  1. Boot from a recovery CD. You should see this. enter image description here

  2. Open the Command Prompt and type bootrec /fixmbr. enter image description here (Images from HowtoGeek)

  3. Close the Window and choose "Startup Repair" this time. Wait until the process is completed. It usually takes about 30 minutes-2 hours.

If Windows is successfully repaired, you are done. If it is not, you will have to reinstall Windows with a Windows Installation CD.

Next, after Windows is installed or recovered, you will have to delete the Ubuntu partitions. Identify them and delete it with the Disk management Utility in Windows.

enter image description here

After that, reinstall Ubuntu the same way.

share|improve this answer
boot repair says its recommended repair should fix problems when you can't boot Windows after installing Ubuntu – damien Jun 28 '12 at 3:05
Oops, forgot about that. Thanks for reminding me! – Emerson Hsieh Jun 28 '12 at 4:58
Thanks for the Answer. I was able to boot windows again [Ubuntu's disc partition tool did not work.] I am only having a problem with deleting the Ubuntu partitions because i simply can not find them. When i restart my computer now, GRUB is gone, and it default runs windows. In my disc partition Utility there are 4 disks: 1. OS (C:) disk which is 20% occupied. (im guessing this is the windows part) 2. 3 Discs of 17GB, 3GB, and 8GB (which im guessing where made during the partition but hve NOTHING on them.) Should i delete them all?keep them all? Should i reinstall Linux but use the partitions t – Mike Jun 28 '12 at 17:49
Please considering accepting my answer if it helped. Thanks! – Emerson Hsieh Jul 1 '12 at 3:52
Back to your problem: OS(C:) is definitely the Windows Part. The 3 partitions you told me aren't empty, it's just Windows can't read them. To verify that those are the Ubuntu Partitions, go to Windows Explorer and see if you only see OS(C:). If you only see OS(C:), then those are Ubuntu partitions. You can delete them safely. – Emerson Hsieh Jul 1 '12 at 3:54

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