my computer--->manage->computer management ---->select drive drive and right click delete partition
boot partition
In Windows Server 2008, a physical drive using MBR partition style can have up to four primary partitions and one extended partition.
Disk management
The boot partition
All hard drives must have at least one partition to be usable by an operating system, even if the partition uses the entire drive. If you are installing an operating dissimilar from the one you are using currently (ie. Windows XP and FreeBSD), you should partition the disk from that system's installer, not in Windows.
You cannot format the drive / partition that Windows Vista is currently running on while it is running. You will need to boot from either a partition utility disc, such as GParted, or the install disc of the operating system you want to install, and format the drive from there.
If you have installed mint to a fresh partition with no other OS on that partition then removing mint is really easy. It applies to any other GNU/Linux. If you are using Windows, then just format the mint partition and boot into the recovery console (R) using the Windows boot cd. type: fixmbr at the recovery console and when it asks for conformation type y.
Go into Control Panel>Administrative Tools>Computer Management>Disk Management. The drive should show up, then you can right click on it, delete the current partition (s), re-partition, then format using NTFS or Fat32 that will be visible to windows based systems.
You can run it for free by using Boot Camp or Parallels to install Windows on a partition of your Apple hard drive. Of course you will have to purchase the Windows OS in order to install it unless someone will give it to you.
If you wish to keep Mandriva, and you do not have an empty space available on the hard drive, you will need to shrink Mandriva's partition, using a partition editor like GParted. Windows will only install to the first partition of the drive, though the partition can be moved. So you will need to shrink Mandriva's partition from the end, towards the beginning of the partition, and then move it towards the end of the drive. Move the swap partition as well. You can then create an NTFS partition, or use the Windows installer to do so. After Windows has been installed, boot from a Mandriva LiveCD, and enter the following commands: grub root (hdx,x) setup (hdx) quit For "root (hdx,x)", the first x is for the hard drive number. If you have only one hard drive, this will be 0. For the second x, use whatever partition Mandriva is installed on. If it is the third partition, use "2". If it is the second, use 1. If it is the fourth, use 3, and so on. For "setup (hdx)", use the number of the hard drive you want the MBR (Master Boot Record) written to. If you have only one hard drive, this will be 0.
There is no upgrade path from Windows ME to Windows 2000. You would have to reformat the hard drive to remove ME before you install Windows 2000 from scratch.
Insert of your Ubuntu CD, then using GParted, delete your Windows partition and resize your Ubuntu partition until it fills the space left by the deleted partition.