Tried this, and I'm still getting the same error message.
I did go back into the registry and confirmed it was changed.
What about the "Retail Install" key? That's currently at 1.
In addition to the double install, there are two other workarounds for activating the W7 upgrade version which will require the product key that came with your upgrade media.
Method one:
1. Navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE. In the right pane, change the value data for
MediaBootInstall from 1 to 0. (I know this was already done; just confirm that it hasn't changed).
2. Click Start, type
cmd.exe in the search box, then right click the
cmd.exe icon and select Run as administrator, which opens an elevated command prompt window.
3. From the elevated command prompt run this command, then reboot:
slmgr /rearm ( resets the activation status)
4. Click Start, type
Activate Windows in the search box, click the
Activate Windows icon, then type in the upgrade product key and activate Windows.
Method two:
1. From an elevated command prompt run these commands:
slmgr /ipk <your upgrade product key> (replaces any existing product key)
slmgr /ato (activates Windows 7)
slmgr /dlv or
slmgr /dli (checks activation status)
.