Do you have your OS disks for the machine you want to wipe?
Can you also tell us if you need to keep any files?
If all you wish to do is wipe the machine then put the OSX disk into your machine and close any windows that may open.
Next shut down your mac then wait 10 seconds and power it back up and as soon as you let go of the power button can you then press and hold down the C key till you get he load icon (spinning wheel below the Apple icon) and let go.
After a few moments the OS loader menu should appear and all you need to do is follow the prompts to perform a clean install which will install a fresh copy of OSX.
Let us know if you have any issues or need any clarification.ThanksEric
Nore than welcome,
Thanks for the Accept and very generous bonus.
If we can be of help in the future just let us know