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#11
If he can open programs as administrator, then he's not using a guest account. Guests are normal users, and cannot open programs as administrator. That alone says that he's using a normal administrative account.
The start menu problem is common among upgrades. There are various fixes, some people find that going into settings and flipping the various start menu access functions fix the problem. How exactly is he trying to access settings if he can't get into start? is search working? If so, you can open settings from there.