It's connected via WiFi to his router and hence to his Windows 7 Home Premium desktop PC. He also has a Brother laser printer connected via USB to the PC.
The problems seem to start a little while ago when he emailed me saying he couldn't get it to print. I went over to have a look round, indeed I've been over 3 or 4 times in the past 10 days or so. I was there yesterday afternoon and, as usual, it printed fine both for him and for me. Late last night I got an email to say it wasn't printing.
Whenever I've tried to print to the Canon it's worked fine. Whenever I've been there and my friend has tried to print to it it's worked fine.
Typically within a day or so of being there I get an email to say it's not printing. There are no error messages, it just fails to print.
One thing I found was that he was switching off the printer using the wall switch rather than powering the printer down with its own power switch. Correcting this approach didn't make any difference.
I reinstalled the printer driver, though it was already at the latest version, no difference.
Going through the way he prints - when I'm there - has not revealed any problem. He typically uses Panasonic PHOTOfunSTUDIO to print his photographs.
The problem I have is that it always prints ok when I'm there so trying to work out what's going wrong is tricky. It's easy to say it must be cockpit trouble but that's not helpful when you can't say or see what the actual trouble is.
One thing I've not shown him how to do is to check via the printer status icon on the PC that the printer is actually on-line when it fails to print, certainly the blue WiFi light on the printer is lit but that, I presume, only means it's connected to the WiFi network, i.e. the router, no necessarily the PC itself.
I'm thinking that perhaps connect it via a USB cable, it's within a 5-metre cable run so that point is ok.
We have more and more laws, and less and less enforcement