Hey DenisCar,
Thank you for visiting the HP Support Forums and Welcome. I will do my best to assist you. I have read your thread on your HP Pavilion dv7 Notebook and Here is a link to deal with the Disk error.
ONCE YOU HAVE BACKED UP YOU SYSTEM--- Start by turning on the computer and immediately start pressing F11, Select the section that says you need to perform a repair of Windows or go to safe mode with command prompt.
Can get to safe mode with command prompt? sfc /scannow would scan your system for errors at the command prompt. You could check this Microsoft document on system recovery options. F10 BIOS setup and restore BIOS factory defaults.
Please note remove any and all USB devices, and remove memory cards from the card reader slot. Disconnect all non-essential devices.
Hope this helps.
Thanks.