Just because your computer fails to boot to Windows or OSX does not mean all is lost. Often times, your data can still be recovered even after drive formats, file deletions, file-system corruption, or light mechanical errors make your data unreadable.
Although catastrophic physical damage requires a clean room, logical damage such as those listed above are often recoverable.
Technology by Dale Pitulski in many cases can assess your drive or media and recover important files.
Successful recovery from logical damaged media costs $150. A replacement device to transfer the recovered data to must be provided.