Can You Use A Windows 7 Full Upgrade Cd Over And Over With A Windows 7 Upgrade Version With Different Serials?
I want to Buy a Windows 7 CD for one PC, and for my Laptop i want an Upgrade Download with serial. Both Version comes with different serials.
Can I use the W7 CD on all my pc’s and just get (upgrade serials) so i dont have to but the CD every time. LOL

If they’re all the same version (such as Windows 7 Professional), the disc and downloads should provide identical software.
You should just be able to install from the disc, and use the serials from the downloads. You don’t have to do a different download for each upgrade you’re doing.
You can only use the upgrade if both PC’s have the same package. For example, ultimate or professional.
I don’t know what you mean by an upgrade serial – there is no such thing. If you have a legitement copy (which would be tough since it hasn’t been released) with a legitement serial number (again, not really possible) it would work.
If you have RC or beta it will not allow you to upgrade either of those.