Poor old Cyril, who's most certainly on his last legs, has a whopping great 128MB of RAM on him. And he runs Windows XP well... as we speak, I've got five tabs open in IE7, 3 conversations going on in Windows Messenger (not WLM), and the caluclator open. And I can Photoshop images reasonably well in Photoshop 7. He's not due for an upgrade anytime soon, until I can afford New Laptop. That's his upgrade.
Mr. Vista on the other hand, has 1GB of RAM, and doesn't cope too well. I can have IE7 with the same sites, WLM with the same conversations and Outlook open as well, and he'll be ssslllooowww. Althought that could be because my Outlook.pst file is so huge. Must cut down on it's size... that mgiht make things happier. Although with a 1GB stick of DDR2 RAM being about $150 installed, that could fix him up too. I've seen Vista run better on a 2.0GHz C2D with 2GB RAM. That's his next upgrade, I think.