Ha Ha Well done rdave. Keep working on it. While they're on the phone you're keeping them away from others.
Yes, I like winding them up. Unfortunately, it's a bit of a give-away once you start laughing! Strange that I had two calls today, though. I rarely get such calls, in fact.
I once told a 'microsoft' caller that I had Linux (although I don't) and he didn't know what that was at all so I spent some time explaining it to him - but had to be a bit imaginative as I've forgotten much of how it is as so long ago since I used it. ;) He didn't know any different though.
Now, I've got a Linx 10 with Windows 10 so maybe I'll be able to confuse them next time anyone rings as they'll maybe get confused between Linx and Linux.