My Lenovo IdeaPad G50 (Windows 10 Home) is black booting to the black screen, which subsequently changes to Preparing Automatic Repair, and never continues; repeats itself after a long time. I have attempted to boot into Safe Mode by typing F8 (this does not work) and I used a Windows 10 USB installer to access Advanced Options - Startup Repair (this does not work) and used Command Prompt to access the installer to run chkdsk C: /f which stalled at 13 percent and I cancelled the command. I have not yet attempted a re-installation of windows since I have valuable files (photos/documents). Normal HDD noises (not SSD, it is an HDD) when using the laptop. Are there any recommendations as to the recovery of files prior to a re-install? Should it be attempted to bootrec /fixmbr and bootrec /rebuildbcd?