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Last edited by ruechok; 17 Mar 2014 at 01:34. Reason: privacy concern
Welcome to Windows Seven Forums.
You can only upgrade from Windows 7 Starter to Windows 7 Ultimate by the Windows Anytime Upgrade method.
Windows 7 Upgrade Paths
If your computer is running Win 7 Starter it shouldn't have any problem with Win 7 Ultimate.
If you want to Anytime Upgrade then type Anytime in Start Search box to insert your Ultimate Product key, it will unlock the extra features in minutes.
If you want to clean reinstall, then boot the installer to overwrite Starter. I would make your Recovery disks first or save a Starter backup image so you have a path back if needed.
If Ultimate won't boot, where did you get the installer? Confirm ISO download or download another, burn to DVD using ImgBurn at 4x speed, or write to flash stick using Universal USB Installer
Use the Universal USB installer with Win7 in dropdown menu. Then boot it using one-time BIOS Boot Menu key given on first boot screen, listed under USB, Removable or HD's.
It does sound as though there is a problem with your copy of Ultimate.
How did you acquire it and where from?