I am in Canada. I  tried getting phoning Dell for last 3 hours but gave up in frustration as I got no answers. They just kept transferrring me to someone else. I have a Dell Studio desktop 540 with Vista 64 bit.. I am eligible for free upgrade to windows 7. I went to page where you apply for upgrade, filled in all info including Service tag number which is on top of my computer. I keep getting error "System is not in our data base. Please verify that you have entered correct Service Tag and review criteria if you feel you have reached this in error, have your receipt ready and contact Dell.".  What phone number at Dell? I've already phoned several and didn't get anywhere? My service tag is correct. When I first got my computer, I opened an account on Dell thinking it was for tech. support but found later it was for ordering, which I wasn't doing. When I go on Dell account it comes up with my service tag number automatically. On that account, I didn't put my real name. I thought it was just to register my computer.  Could that have anything to do with the problem I have ordering my free Win 7 upgrade.  Can anyone help. Thanks.