can't access to my windows user's account

, I just experienced a weird situation with my laptop. I suddenly couldn't access to my user's acccount, while my husband is able to log in to his account without any problem. When I try to log in, a window pops out, and shows " Windows cannot load the users' profile but has logged you on with the default profile for the system. DETAIL- The system has attempted to load or restore a file into the registry, but the specified file is not in a registry like format." This message only stays for 20 seconds, and then I was forced into a guest account. All my data are gone.... I wonder what should I to to be able to open my account again? it was perfectly fine yesterday night... is it a virus? Thank you very very very much for the help

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