Using Windows 7 now on a laptop, no problems upgrading from Vista basic, other then the main memory has taken some from the graphic card and running at 1024 x 768 instead of 1280 x 800, will need to upgrade memory to 2GB i think.
Also did a clean install on a XP laptop, installed but coudn't find the realtex ac97 sound or the railink wireless card, so uninstalled and put XP back on, now have both back.