When I worked for one of the major retail stores in the computer section (this is early 2000s), I sold a brand new computer to this lady (she declined buying any anti-virus off the shelf, part of my normal protocol to ask). She called the next day and said I gave her a computer with viruses, so she needs a new one.
I tried to explain to her as simply as I could that it’s most likely the activities she was doing, but she was not having it. So… she sent her husband after me.
The husband comes into the store later that day. I try as nicely and as carefully as I can to explain to him how brand new computers work, and how viruses come into the computer due to the possibilities of his wife or him downloading something/clicking on the wrong things on the internet.
Me: “Sir, the same thing will happen again with another computer, depending on what you’re doing to bring in the virus. I suggest trying to clean up the computer with anti-virus/malware scans.”
Customer’s Husband: “Give me one.”
Me: “We sell them as separate software here.”
He used that as a big “aha!” moment.
Customer’s Husband: “You guys pre-loaded viruses on our computers, so we have to spend more money!”
I started to care less and less, and told him there’s decent free anti-virus software/malware scanners you can get as well, and named a few.
Customer’s Husband: *Insisting angrily.* “No! You sold us a defective model pre-loaded with viruses! Give us a new one!”
Eventually, my manager had to come out and tell him:
Manager: “The viruses came from the websites you’ve been visiting, and for your computer to get this badly infected less than twenty-four hours after buying it, I can only imagine what sites they might be. Now either buy some anti-virus software or use the free versions my associate has suggested. If you bring it in for a refund, we will do that for you, but we can refuse a sale if you want to buy a new one without taking adequate precautions.”
Customer’s Husband: “This is all a scam! Computers will always be scams!”
He stormed out without buying anything.
They were both back at the weekend, buying the cheapest anti-virus software we sold.