I had the same problem, I couldn't register for the 7 upgrade or contact hardware support. Check the tag is the same on the bottom of the system, in the BIOS and on the box it was packaged in. Then, go here: [URL] Fill out the form, select "Something is incorrect" and in the last box say you can't register for Windows 7, and include the service tag - also tell them you have checked as above and it is correct. Bear in mind there will be a backlog from the weekend so they might not get back to you until late on Monday or Tuesday.
My Serbice tag is still not working with the Windows 7 upgrade. i have registered the product, brough it mid august, inspiron 1545. it just still dosnt work. i registered it 2 weeks ago. im wondering if somewone has hijacked my copy or something. i really need it. i would be much appreciated if someone could resolve this thankyou
Windows 7 Upgrade Still not working.