So I was trying to print something for my daughter on the color printer attached to my wife's machine - and Windows has decided that said machine - which has been on continuously, is connected by wire to the router, and is definitely in the same workgroup - doesn't exist. It was there a week ago, but now Windows assures me that it's not there.

So I glance over at the Mac, which is also on the network, and have a look, just to see what it thinks - and sure enough, it sees all the same printers (and shared drives, etc) that it's always seen. So why is it that Windows - which is presumably interoperable with itself - seems to forget which devices are on my LAN, while the Mac cheerfully sees the lot of them? Or for that matter, the ancient (RedHat 7, for gosh sakes) Linux box? It sees everything as well.

I love it when a simple print job takes 15 extra minutes of my time because the OS had a senior moment.