I've had the "your PC has a virus!" phone call a few times.
The first couple of times my OH answered the phone and just hung up on them as soon as they started mentioning needing "remote access" to the PC.
When he was at work one afternoon the phone rang and I picked up to hear a really frantic man telling me my PC had so many viruses the systems they use were "going mental" over it.
I giggled to myself and figured I'd have some fun as this was (by this point) the fourth or fifth time we'd had similar phone calls.
Me: "Oh my goodness, what should I do?"
Him: "It's fine, I can help you. First you need to log into your PC and then disable all of your anti-virus software and any firewalls."
Me: "Right, just doing that now.... Okay, now what should I?"
Him: "Now you need to visit this website (he gave me some very dodgy sounding website to go to) and register and make sure that you put in all of the details and specs for your PC correctly."
Me: (making noises as though I'm following every word)
Me: "I've done that, I'm really worried about my computer now, are you sure you can fix it?"
Him: "Yes absolutely, what I'm going to do is get you to allow me to log into your PC remotely and I can make sure that it is completely free of all traces of viruses."
Me: "That's brilliant, thank you so much. I don't know what I would've done if you hadn't called!"
Him: "It's no trouble, just doing my job. Right so if I can take your networking details I can access your PC remotely for you."
Me: (I give him some made up information)
Him: "Hm, I don't seem to be able to find your PC. Let me keep trying."
(He then puts me on hold and I try very hard to not laugh. So far this has taken a good 20 minutes)
Him: "Sorry for the wait, would you mind if I have a word with my supervisor? I can't find your PC at all and I'm worried that the viruses are worse than I thought."
Me: "Oh wow, of course you can, that's fine."
(He goes away again and comes back 5 minutes later)
Him: "My supervisor has found the problem, but in order to fix this so I can then fix your PC I will need to take a nominal fee of £49.99."
Me: "That makes sense, let me get my card for you."
(I leave him hanging for another 5 minutes while I "search" for my card)
Me: "Right, I've got my card here; what do you need?"
(I can practically hear him rubbing his hands together now)
Him: "The long number on the front to start with, please."
Me: "Sure thing! Oh, just before I do can I ask a question?"
Him: ".......yeah.....?"
Me: "Can you still fix these problems with an iMac because that's actually what I've got?"
(He hangs up and I proceed to cry with laughter)