My computer had problems and I took to a home based computer technician. When I went to pick it up he asked me to check the files. I checked my most important Excel file that has my financial information including my credit card and debit card numbers (just in case I lost my purse). He told me to come back after 30 minutes so that he can do the diagnostics and prepare the invoice. When I came back he and other technician were looking at my files. He may have backed up my files. I got very bad vibe from them, What should I do ?