Use streams.exe to unblock Security Center installation package files that remain blocked after manual intervention.
What you should know
- Download streams.exe from https://technet.microsoft.com/en-ca/sysinternals/bb897440.aspx.
- Open a command prompt window.
- Enter streams.exe -d <filename>, where <filename> is the name of the file that needs to be unblocked.
After you finish
If you unblocked the entire ZIP installation package (not specific files contained in it), you must extract the package again prior to installing Security Center.