HP Dc7100 Data Execution Prevention - White Paper, 2nd Edition - Page 1

HP Dc7100 - Compaq Business Desktop Manual

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Data Execution Prevention v1.2 Introduction 2 Data Execution Prevention (DEP 3 What does Data Execution Prevention do 3 Data Execution Prevention Exception Message Box 3 Hardware-Enforced DEP 3 What is PAE 4 Why is this change important? What threats does it help mitigate 4 Will my NX- or XD-enabled systems protect me from virus attacks 5 What are the required components for XD/NX to function 5 How do I control the DEP functionality on my computer 8 DEP Level Chart 9 Data Execution Prevention Tab - No XD/NX Processor 10 Software-Enforced DEP 10 Deploying Hardware-Enabled Data Execution Prevention 11 How will XD/NX impact HP customers 11 What about customers who create their own software image 11 Advantages of using XD/NX 12 Disadvantages of using XD/NX 12 Conclusion and Recommendation 12 Known Issues 13 Frequently Asked Questions 16 1

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1
Data Execution Prevention
v1.2
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Data Execution Prevention (DEP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
What does Data Execution Prevention do? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Data Execution Prevention Exception Message Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Hardware-Enforced DEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
What is PAE? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Why is this change important? What threats does it help mitigate? . . . . . . . . . . . . . . . . . . .4
Will my NX- or XD-enabled systems protect me from virus attacks?
. . . . . . . . . . . . . . . . . . .5
What are the required components for XD/NX to function?
. . . . . . . . . . . . . . . . . . . . . . . .5
How do I control the DEP functionality on my computer?
. . . . . . . . . . . . . . . . . . . . . . . . . .8
DEP Level Chart
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Data Execution Prevention Tab - No XD/NX Processor . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Software-Enforced DEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Deploying Hardware-Enabled Data Execution Prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
How will XD/NX impact HP customers? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
What about customers who create their own software image?
. . . . . . . . . . . . . . . . . . . . .11
Advantages of using XD/NX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Disadvantages of using XD/NX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Conclusion and Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Known Issues
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16