Just had one yesterday; new customer. Wife calls first (the family pants-wearer, as I found out later), then gives the phone to her husband. He's the actual computer user. Tells me there's a problem with his browser; closes upon startup (which version, I don't know). Tell him I can make an appointment, had already told his wife my fees, and set a time.
Got to the house; an elderly, nice gentleman, and the overbearing, watch-over-your-shoulder wife. I couldn't tell what the problem was at first, told this lady I didn't know yet (as she kept badgering me about what was wrong, complaining about my charges, etc.), and finally determine that their problems started last Thursday. Look at Windows Updates on this Vista machine, and sure enough, a whole slew of them, including IE8. I make a judgment call to revert to 7; that doesn't fix it, but IE stays open long enough to see that there are (seemingly) a KABILLION frickin' toolbars installed! Think that caused your problem? So I disabled every last one of them, and sure enough, IE7 was working fine. Since she was obviously clock watching, I stopped immediately, got a check for an hour's work and got the hell out of there. Could I have done more? Yes, but since she was SOOO concerned about price, I decided to vamoose.
Won't work for her or her husband again. It's another reason why I quit giving out business cards upon arrival to a new customer's location. I'll give those out only AFTER a smooth experience with said customer. Don't need a bad customer giving my business cards out to other bad customers.