Looking at the signature of a file quickly lets you know whether that file is really what it claims to be. Here's how to tap PowerShell to figure out the file signature.

Learn how to add Unblock a File to Windows right-click context menu. Use a PowerShell 3.0 commandlet, add an entry to the Registry and you are all set!

The finale of Prof. PowerShell's 7-part series ends with creating a zipped file.