IP address maps to Chicago (not always accurate).
http://www.geobytes.com/IpLocator.htm?GetLocation&IpAddress=173.23.1.91
I would receive phone calls from a Indian accent caller claiming he was Microsoft. They would tell me that my computer has a virus that was sending unwanted data onto their mainframe. These calls would come at least five times a week with a caller ID: “####-0000.” For a fee they would fix the problem. All I had to do is give my credit card number and let them have full access to my computer. When I said I have more than one computer, they said they would have to charge me for the other computers and give them time to get full access of them.
It was a telephone Phishing scam. I am sure you are being scammed with a email Phishing spam. Report them to your state attorney general.
There are a lot of scammers that do this. Another popular one is to say you used a picture that they hold the copyright too. I always ignore them and have never been sued or paid them.
What does the notification say to do? - cease and desist? lawyer up? destroy the file? - send ‘em a hundred bucks and they’ll forget all about it? - I’m guessing like most everybody else it’s some sort of scam.......
If it was a letter, then get an attorney's advice. He'll contact the firm listed in the letterhead.
Who was working and had computer access at 7:49 GMT on 2/22/14?