Avoid "Hiren’s Boot CD 15.4 Cracked" or "Hiren’s Boot CD 15.4 Pro" websites. These often bundle malware or password stealers. Always verify the file size (should be roughly 540 MB) and scan with VirusTotal before burning.
Let me paint you a picture.
Most modern tools will tell you a clicking hard drive is "dead." Hiren’s includes a tool that attempts magnetic reversal to repair bad sectors. It sounds like science fiction (and it usually fails on physically destroyed platters), but I have personally brought two dying drives back to life just long enough to copy 100GB of data off them. Hirens Boot Cd 15.4