What is laptop name and spec? The power loss part way through updating could have corrupted the system. It's not a laptop with a very small disk drive is it? Some laptops have only a 32GB disk and, after you install Windows and a few programs of your own, there is not enough room remaining for Windows updates after a while and so the system becomes corrupted due to failed updates. These laptops with small disks should not be sold. In either case a Windows reinstall may be required. Always keep laptops plugged in when updating.
HTC U12 Plus review: Hands-on