[header] How to change a computer hard drive disk [title] If your hard drive is still working, make sure you make recovery disk or image by using backup or recovery software. [step] If your drive has already failed, hopefully you have your important files saved somewhere as backup. [title] Obtain a new hard drive. 
[step] Make sure you have the right type of hard drive for your computer. Generally speaking, you want to replace your original drive with a similar drive to make the process easier and simpler.