Yeah, I think everyone has it. What you have to do is go to Microsoft Securty Essiantials -> Settings and create an exception for .exe files.
Also I'd recommend uninstalling your anti-virus permanently and never ever downloading a free to use one or ever buying one ever again. They are useless and do nothing. All you need to have to protect your computer is Microsoft Security Essentials and Malwarebytes Pro (or a similar program) and then add exceptions to certain files your computer may mistake for trojans/viruses.