“When you open a file in Windows, such as an .exe, .cmd, .reg, .regedit, .secfile, .com, or .bat file, a different program or file may start. Additionally, the icon for the file may not appear as expected. You may also receive additional errors from the from the program it starts…

This may be the result of malware, such as XP Antivirus 2012, XP internet Security 2012, or a variant of the Win32/FakeRean virus.”

And you can fix this automatically with the following Microsoft Fixit

microsoft fixit 50895

Read the full KB article (KB2656106) - When you open a file on a Windows based computer, the file may start a different program

Rob