You have a program that you just install and it causes an error, sometimes with a crash of Windows Explorer by telling you that the system Prevention Data Execution caused the interruption for security reasons .

Unless your program is reliable and you never want to be bothered by this kind of security implemented since Service Pack 2 (SP2) Windows XP. To remove this, you just edit your boot.ini file and position / NoExecute = AlwaysOff instead of what you had.