On monday i recieved a postcard at 12:42pm on the internet and i have no idea who sent it?

Be so very careful about opening things like that. I received an e-mail from someone with a first name I recognized so I opened it. It was nothing but gibberish and 2 days later my computer crashed. I lost everything that I had not had a chance to back up and make discs of. I suggest you get to backing things up. I lost so many pictures of my kids that I will never get back among other things, but my pictures were most important. I felt like my house had burned....I literally cried.