Service DEP (Data Execution Prevention – Prevention of Data Execution) is a function from the Windows SP2. This function is to prevent malicious script code in certain areas of Windows usually reserved for the storage of non-executable data.Data Execution Prevention (DEP) is a security feature that helps prevent damage from viruses and other security threats by monitoring your programs to make sure they use system memory safely.
This feature can be some times annoying as it will close the program or game as soon as you start them..
I had this problem …