Did you accidentally delete a file, folder, picture, document, etc and it's no longer in the Recycle Bin? If you did, you may be able to recover it with Recuva.

When you delete a file from​​ the Recycle Bin, Windows forgets it, but it's still on the hard drive until Windows writes data over the location on the drive on which the data is stored. Once it's overwritten, chances of recovery are vastly reduce, which is why you need to stop using your computer if you delete something that you have to have back.

​​If you stop using the computer immediately, software may be used to try to salvage the lost data while the machine is turned off and not writing any new data to the drive.

If you need to recover data from a physically broken hard drive or from a hard drive that has a mechanical failure, you will need to seek professional data recovery because recovery data from drives with those issues requires special tools and skills. I recommend checking out $300 Data Recovery.​​

Checkout this hard drive simulator to see and hear mechanical hard drive failures if you think you may be experiencing one.
Data Recovery
Hard Drive
(Where your data is stored​)