In brief, you finished downloading a PowerShell script from the Internet, you open PowerShell as Administrator, and have use the "SET-ExecutionPolicy RemoteSigned". Now, everything should work… Right!! But, "NO" it would work. Somehow, on Vista, still knows the script was download from somewhere else and is a block status. You need to right-click on the script and select "Properties". Then, look for the "UnBlock" button. Only, then you will be able to execute the script. Look at the sample pic.