My system has suddenly started giving me a 'Windows Security - These Files cannot be opened - Your Internet security settings prevented one or more files from being opened.' Message when I tried to start 'The Sims 3' game. I have played this before, many times. I also got the msg when trying to install Antivir Antivirus. I couldnt install it. I Have changed the internet security settings and still nothing. I have run virus/spyware checks and they are clean. I don't know what to do - there is obviously something wrong. I am running Windows 7, 64bit version. [Window Title] Windows Security [Main Instruction] These files can't be opened [Content] Your Internet security settings prevented one or more files from being opened. [Expanded Information] C:\Users\LADYNA~1\AppData\Local\Temp\RarSFX0\presetup.exe [^] Hide details [Close] [Footer] Why can't these files be opened?