[Freebooter]

Try formatting the Ubuntu partition from Windows Disk Management console then try deleting the partition.

[TheGrayAviator]

Thanks a lot for your reply. But can you tell me where i can format the partition I 'm not very experienced with this, and there is not an option to format an partition as far as i can see.

You can use the diskpart utility that comes with Windows.

[Freebooter]

Try not use Diskpart command as it can be very danger's if you don't know how to use it, Disk Management console is where you have post screenshot of it in your thread select the Ubuntu partition and select Format.

[img]http://img.prntscr.com/img?url=https://i.imgur.com/UN5RwN4.png[/img]

[TheGrayAviator]

Go to CMD type diskpart, then type list partition.

Could you then post a screen shot of what it looks like?

[TheGrayAviator]

Ok type the following commands in order:

1) Diskpart
2) Select disk 0
3) List partition

[TheGrayAviator]

From the screen shot, I am guessing your Ubuntu Partition is number 0.