Unknown filesystem grub error after unistalling Ubuntu partition from Windows 8

Question

I have a really big problem. I deleted Ubuntu partitions from Windows 8 and now on startup of my other pc (im using my old one now to contact you) it shows this error:

Unknown filesystem: grub rescue>

tried some commands from other threads but it shows me again the same error. I think that Ubuntu has been completely uninstalled, but this grub rescue pops me out.

I cannot boot in my pc anywhere! either in Windows. The only thing i can do is write commands in grub rescue, or enter BIOS Windows Menu... :(

Answer 1

This is the correct procedure. It's for Windows 7 but works for 8 too. From How to remove Ubuntu and put Windows back on?

To remove Ubuntu, you will need a Windows Recovery CD or Installation CD, or a Ubuntu Live CD.

Note: If you don't have a Windows Installation or Recovery CD available, you can download the Windows 7 ISO file (contact Digital River costumer support as said in Microsoft help page). You cannot install Windows with a genuine Purchased Product Key though, as these ISO files are 100% legal and will only install as an Evaluation copy for 30 days without a product key.

To remove GRUB:

1. Grab a Windows recovery media or installation CD and boot from it. You should see this on a recovery media CD.

   

   And you should see this on an installation media CD. Click "Repair your computer" and you should see a screen like the first image.

2. Open the Command Prompt, then type bootrec /fixmbr into the Command Prompt.

   

3. Reboot and boot into Windows. Then follow the steps below to remove the Ubuntu partitions.

   (Images from HowtoGeek)

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If you don't have a Windows recovery CD or you are too lazy to download and burn the ISO files mentioned before, you can use Boot-repair. It is a tool that fixes most boot problems(Windows or Ubuntu). I suggest using a Windows CD if possible.

To use boot repair:

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.

   

   To fix your computer with Boot-repair, simply click the "Recommended Repair" button. Then follow the steps below to remove the Ubuntu Partitions.

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To delete the Ubuntu Partitions:

4. Go to Start, right click Computer, then select Manage. Then select Disk Management from the sidebar.

   

5. Right-click your Ubuntu partitions and select "Delete". Check before you delete!

6. Then, right-click the partition that is on the Left of the free space. Select "Extend Volume". Go through the Wizard and Finish it.

7. Done!