Hi Andrew!
Thanks for reaching Microsoft Community. We're here to help and let's work on this together.
Regarding your query, most common reason for this issue is due to a corrupted operating system. I would highly suggest you perform a recovery image reset already. This option reimages the entire device, including the partition on the hard drive. It is the most complete form of reset. Before you begin, you must have at least an empty 16GB/32GB of USB Flash drive and it must be formatted to FAT32 prior to downloading the Recovery Image.
To proceed, please follow the detailed instructions in Creating and using a USB recovery drive for Surface - Microsoft Support.
Please let us know with how it goes. We look forward to hearing from you.
Regards,
RodelioP.