Just upgraded a laptop that came with Vista to Win 7, had a few problems so far. Wife did it actually, since the disk came in the mail when i wasn't home she goes" can i install the win7 disk?" I told her i wanted to make a backup first and that takes a few dvd's so i told her where the blanks where and go ahead. It wouldn't make a backup on cd's or dvd's kept giving some error so she skipped that part. She installed it, it ran somewhat, than said a few problems occured, of course they are a mystery now since i wasn't there yet. I came home from work 2 hours later, still trying to install, kept finding some sort of problems and restarting, getting a little bit further each time. It didn't like Itunes nor Limewire , wanted you to remove it to get any further. Finally about 1 hour past her bedtime it got done. No email program, Vista had Windows mail and now it's gone. But they save your email contacts and such so if you go to Windows website you can download Windows live which does email. But the wireless was not working. I can see both of my neighbors encrypted networks but not mine 4 feet away. Turn on my wired desktop computer and try to search for people with similar problems such as this, 1000's, too many to wade through. Shut it down for the night. Today, i reset my Linksys WR54GS wireless router all the way back to factory defaults, erased all my passwords and settings and finally the laptop sees it. Then i slowly change the name of my router, channel, WPA2 personal AES, and whatever long long password back to everything the way it was and it still sees it. Now my free Gov. versions of firewall and virus scanner which worked on Vista, won't work with WIN 7. I had no problems with Vista on 2 laptops, never had any problems running WIN ME on older machines either which a lot of people downplay. Vista's 2 lower versions won't let you do entire disk backup, only files and documents and settings. I should have just bought another laptop hard drive and ran win7 onto it, that way i could swap Vista back in if needed. So far, 2 thumbs down from me.What i have read about WIN 7, (barely) They said if upgrading from XP, it blacklists your XP number so you can't use it on any other machine. But i guess if you uninstalls win7 and went back to xp, you would have to make a phone call to register it.