Why would a hp laptop keep saying an unexpected error, press OK to restart installation, many times?

That usually means something’s tripping up the Windows/HP setup, often a corrupted install file, bad drive sector, or a BIOS/driver hiccup.
Try running HP’s hardware check (F2 on startup), make fresh install media from Microsoft’s site, and reset BIOS to defaults.
If it still loops, the drive might need replacing. Don’t worry — the tests will point you in the right direction.

Cause it’s full of errors 😅 did you get it fixed?