Data Execution Prevention (DEP) is a Windows Vista security feature that can help prevent damage to your computer from viruses and other security threats by monitoring your programs to make sure that they use system memory safely. If DEP notices a program on your computer using memory incorrectly, it closes the program and notifies you.
Some legitimate programs may not run correctly when DEP is turned on. Check for a DEP-compatible version of the program or an update from the software publisher. If one is not available, you can turn off DEP for the program:
1. Go to Start >> Control Panel >> System
2. Select Advanced System Settings from the Tasks list on the left
3. Select the Advanced tab, then Settings under the Performance section
4. Select the Data Execution Prevention tab, then click to Turn on DEP for all program except those selected
5. Click on Add, browse for and select the applicable program
6. Click on Apply, then click OK to confirm
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