Why does the un-installer not un-install the entire EDK software?
When a service pack has been installed, the installer cannot un-install the main program plus the service pack. This is a bug in the installer that will be resolved in a future release. To work around this issue, un-install the service pack and then un-install the EDK software as follows:
This problem has been fixed in the latest EDK 9.1i Service Pack, available at:
The first service pack containing the fix is EDK 9.1i Service Pack 1.