(Redirected) Inspiron 5520 is not booting up with Windows 10

Hi,

My Inspiron 5520 is not booting up with Windows 10. When starting it is showing Dell logo and it progresses.. I can see right bottom the options Like F2 SETUP,F12 BOOT OPTIONS.

But nothing happening after this..I am getting a black blue mix screen with cursor is blinking with circult (windows processing sign). If I kept on system - once in a whiel its blinks with / black screen nothing loading. Sometimes its showing a Square of blur colors in middle of the screen but doing nothing.

Trid multiple times to check BIOS and F2 Setup or F12 with diagnosing but nothing worked.

I have successfully completed - Dell Pre-boot System Diagnostics without any issues - all tests passed but still its not booting. (I have disconnected all the connectors like hdmi, wireless mouse etc.). Problem not resolving.

I am totally stucked..My laptop's warranty period is over. Your help much appreciated.

Thanks in advance.

Regards,
Anand