I have a few small .exe files that I received by e-mail. When I click on them to install the program I get a message saying Windows is preventing running the file for security reasons. I know the file is free of viruses and want to install it. I am told there is a setting somewhere to turn this security feature "off"---can you tell me where that is/how I do it? I am the only user of my PC and want this annoyance turned off. I am running Windows 7 Pro 64-bit on a stand-alone PC with a hardwired Internet connection (no router). Thanks for any help you can give me!