When hard drives go down and you've lost data, you can attempt DIY data recovery by first shutting down your computer immediately to prevent overwriting deleted files. Next, create a clone of your affected hard drive using a cloning application on another computer, then scan this clone with data recovery tools. However, if your drive is making strange noises, booting slowly, or the data is critically important, it's best to shut down your computer and contact a professional computer repair expert like Dave's Computers in New Jersey (908-428-9558) to avoid further damage or permanent data loss. These DIY hints apply only if data is already lost and you wish to try recovery, not for preventative fixes.