Practical joke gone very wrong

O.K…. so… I work in the Library IT industry and we have a domain setup for all users in it… My co-worker decided he was going to put his computer on my desk for a week… i don’t know why…

I played a little joke on him and set his domain user account (that was originally an administrator) to a guest account.

He restarted and didn’t know that I did that…

3 days later, he logs on and it, according to him, creates a new profile… he isn’t able to find ANY of his documents…

is this because of what I did? he had been complaining about how unreliable the laptop had been for the past 3 weeks…