I am using Windows 8.1 Pro 64-bit. I see this error, almost everytime I launch an executable file (to install it) but not for all of them. I don't see the error when I use Run as Administrator. I looked around, and found a solution: I needed to give permissions to the current user for the temp file as shown in the picture below: The problem here is solved temporarily, but it goes back to give me the same problem after restarting the PC. What can I do to prevent such a thing? I don't really want to use the built in Administrator account all the time. Update: The problem is caused by the cracked version of Adobe Acrobat. And the root cause is the cracked amtlib.dll Read more here: http://www.sabernova.com/2013/12/cracked-adobe-acrobat-xi-will-revert.html#axzz2r8VSzZi9