I am Makarand P from the Dell Social Media and Communities team.
With regards to your issue, the issue is caused because the computer was shut down while booting up on multiple occasions or was shut down while getting it to hibernate. Due to this the file for the system memory used during hibernation might have got corrupted. Also, was the memory removed or reseated at any point of time.
I would suggest you to navigate to BIOS by pressing the F2 button at the Dell logo screen and reset it back to defaults. Doing so would ensure the right amount of memory is detected and system should boot normally.
Upon loading of windows, if you get a prompt to repair the file or clear the memory, please do so. It is a single click procedure and a automatic repair option on click.
Kindly revert for further clarifications.
Thanks and regards,
Dell Social Media and Communities Responder