Uninstall Diablo II: Resurrected (Live) via Battle.net or Steam.
Manually delete remaining install folder:
C:\Program Files (x86)\Diablo II Resurrected\
Delete:
%ProgramData%\Blizzard Entertainment
%LOCALAPPDATA%\Blizzard Entertainment
(Did NOT delete the Battle.net folders.)
Reinstall Diablo II: Resurrected.
No reboot required in this case.
If this doesn't work you might have a issue with your GPU.