Removing a Linux install

[Le_Mouse]

Hello folks!

I need help with a laptop I have received recently (freebie!!!). The laptop has CentOS installed on it (on the entire HD), but I don't have the login and passwords for any of the user accounts or for the root. I want to wipe out the CentOS and install Windows 2000 on it, but apparently I cannot delete the Linux partitions. I've tried with several applications, including SuperFDISK, without any success. I'm a newbie in Linux and I don't know how to retrieve passwords. As I have read, I have 3 options:
1. Boot form a Linux floppy and delete partitions using the Linux fdisk; I cannot create the boot floppy because I cannot log in. I've tried to use the Ubuntu CD, but it cannot handle the partitions.
2. Find a way of creating the Linux floppy on a Windows machine (either XP, Vista or W7); the links on the RedHat website are dead (bootdisk.img and rawrite.exe; yes, CentOS is a version of RedHat).
3. Find a standalone application that can remove the Linux partitions
Any help will be greatly appreciated; my goal is to delete the Linux partitions.

[Paul Komski]

Try wiping the disk with DBAN (http://www.dban.org/) or CopyWipe (http://www.terabyteunlimited.com/copywipe.php) or a utility from the maker of the relevant hard drive. Then partition and format etc.

[Le_Mouse]

Thank you my friend! DBAN worked perfectly!

[zxda10]

use easus partition manager to delete partiitons. (you can't be on the partitiion you are deleting. + you can istall linux or vista without a CD, usong daemond tool