Mark _australia said...
Do I reformat and then run kill disk, or just run kill disk on my PC as is, with everything installed - and then I have an 'as new' HDD?
Step1. Save all the data you want to keep on something. (ie thumb drive, CD or DVD, external HDD what ever.)
Step 2. Insert the floppy or bootable CD on which you have "kill disk" into the appropriate drive.
Step 3. Reboot your computer and during boot hit delete or F2 or F10 or whichever key you need to hit to enter the BIOS and set the computer to boot from the drive that has the "kill disk" program in it and let it boot.
Step 4. You will then have a DOS type page on the screen. Navigate this with your key board to run the "kill disk" program. This will erase ALL data from your HDD and write it all to zeros instead of ones and zeros as it is now.
Depending on how large your HDD is you might consider doing something else instead of sitting in front of a PC screen.

Make a cup of coffee and start reading a book is one option.

The program may take an hour or more to do it's task depending on your processor speed.
The free version will do one pass over the drive but you can rerun it 9 times like the paid version if you want. I think once is enough but I have run it twice usually when I have used it.
This should restore the HDD to the same condition as it came from the manufacturer.
Step 5. Remove the "kill disk" disk and insert your Operating System disk and reboot your computer. If you ran "kill disk" from a floppy drive, during the reboot reset your computer to boot from the CD drive.
Step 6. Reload your system as per the on screen prompts.
If your PC originally shipped with Windows XP, the Windows disk will have most or all of the drivers you need to get the computer going. If you have driver disks for various components they will be handy. XP will need to be updated to service pack 3.
If you bugger it all up, take it to your local computer shop, tell them what you have done and they will probably fix it all up for $50 - $100.
If your PC originally shipped with any thing earlier than Windows 2000, you should give a salt water flotation test before doing anything else.
