Your Microsoft Support Link does indicate that the error you have is one that is recognised by them as a problem in Vista. Have you got the latest Service Pack as suggested by them (SP1)? If not now might be a good time to try Update and see if it is available for your machine. If you do already have it installed (and you can find out by going to Computer -righ click - Properties and look at Windows Edition) then you can either ignore the warning if it is not troubling you or you can go to it in Device Manager, righ click, uninstall and then either reboot or click on search for new hardware at the top of Device Manager.
I'm sorry for the delay in getting back to you but i had to go shopping.
jack. It's a Gateway computer with Microsoft Vista Home Premium. I haven't installed any reader. But I have noticed that when I plug in my camera, it is in the Device Manager as subheading under Portable Devices, as is the USB CF Reader which has the yellow triangle icon.
chub-tor. Yes I have downloaded SP1 and it is under Computer > Properties. Maybe I'll take the first part of your advice and just ignore it - for now.