You don't need to enter an Upgrade code for Microstudio. Are you sure that you have downloaded the Microstudio 2.604 Program? The file that you now have on your computer that you are double clicking on to begin the Setup should be named mstudio2604setup.exe. If not then go back to your email and click on the link to donwload this latest version.
Also, make sure that the User that you are logged onto your computer as, has Administrator Rights. Also make sure that you don't have any software installed on your computer, that is keeping the program from writing to the Registry. If you have anything that is blocking the Registry, then it will never install correctly.
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Bryan, MTU
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