Perhaps an errant update has corrupted the OS...; if you were using a most-recent WIn10 version, perhaps you can do a repair install, using a freely downloaded version of the OS making your own USB installer....
(If a prebuilt, many come with an installation partition...)
Do you need files/data from it? If so, if a 2.5" SATA SSD or 3.5" spinner drive, you can install it in a computer that functions to see if another PC can read from it, assume ownership (if not an encrypted drive), and recover your data. If not needed, a full wipe (delete partitions, quick format) and reload via the USB installer flash drive is always an option