If you are running Windows and Linux on your computer (dual boot) but you can’t really get Linux to work properly or just want to get rid of Linux to give Windows more room on your computer.
You will need to unistall Linux as well as remove the partition between Linux and Windows.

First get your computer to boot just in Windows (single boot).
You have two options:

1. Boot into Windows Recovery Console via your XP CD and run “fixmbr” to clear the master boot record (this is where Lilo or Grub is kept).

OR

2. If you can find a copy of a Win9x/ME boot disk, that will work too. You just have to type “fdisk /mbr” at the DOS prompt instead of “fixmbr”.

Once you do this and boot straight into Windows, simply right click My Computer, select Manage, go to Disk Management, and delete the Linux partitions. Then use those partititions for whatever you want or merge them back into your Windows partition with Acronis Disk Director or Partition Magic.