Sadly, not only must industrial controls not emit too much RFI (deep information at http://www.arrl.org/tis/info/rfigen.html ) but such controls must not fail when subjected to bursts from say a cell phone. If your system is affected by a laptop with wifi, then a cell phone is of some 100X more power and the same issue would exist. I'm writing from my background as an embedded controls designer.
I never discount such claims, but I've yet to find this effect in a home system. However it was noted in an elevator control under an unusual condition. The elevator service person had the control panel off, a diagnostics system attached and proceeeded to make a cell phone call. The diagnostic controls picked up the cell phone burst and the elevator in turn got a command from the diagnostic controls... It was repeatable. The fix was to install a shield on the diagnostic system but that was never tested because it's not a normal part of this system.
OK, you've read all that. My reply is this. I'm going to write... doubtful.
Bob
My husband states that our HP laptop (a HP zd7000 series notebook) is interfering with the microprocessor that controls our furnace and the microprocessor that controls the timer for the lights in our home.
It is wireless ready, although I have not set that feature up. I have dsl internet access also.
Is this possible? and if so what devices do we need to screen against it. I am setting up a business out of our home and I need the access of the computer and internet.
Please help.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic