The answer is to temporarily disable Driver Signature Enforcement. This is the correct security setting because Windows 10 blocks unsigned drivers by default to prevent malware or unstable code from loading into the kernel, and when a new external hard drive requires a driver that lacks a valid digital signature, the system throws the "Driver IRQL not less or equal" blue screen error. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your understanding of Windows security features and driver troubleshooting, often appearing as a trap where candidates might mistakenly check antivirus or User Account Control instead. Remember that Driver Signature Enforcement is a kernel-level security measure, not a simple permission setting. A useful memory tip is "Unsigned driver, blue screen survivor" — think of temporarily disabling signature enforcement as a diagnostic override, not a permanent fix, and always re-enable it after testing to maintain system integrity.
220-1202 Windows Security Settings Practice Question
This 220-1202 practice question tests your understanding of windows security settings. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user reports that their Windows 10 laptop shows a blue screen with an error message about 'Driver IRQL not less or equal' after connecting a new external hard drive. They need to use the drive for work. Which security setting should you check to ensure driver installation is not blocked?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Disable Driver Signature Enforcement temporarily.
Driver Signature Enforcement ensures that only drivers with a valid digital signature can be installed. If a driver is unsigned or has an invalid signature, Windows may block it, causing errors. This setting is part of Windows security and can be temporarily disabled for troubleshooting.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Check if Secure Boot is enabled in UEFI.
Why it's wrong here
Secure Boot checks boot loaders, not driver installation during runtime.
✗
Verify that User Account Control is set to 'Notify me only when apps try to make changes.'
Why it's wrong here
UAC controls app permissions, not driver signature verification.
✓
Disable Driver Signature Enforcement temporarily.
Why this is correct
This allows unsigned drivers to load, which can resolve the blue screen if the driver is the cause.
Related concept
Static NAT maps one inside address to one outside address.
✗
Run Windows Update to find a signed driver.
Why it's wrong here
While updating may help, the immediate issue is the driver being blocked; disabling enforcement is a quicker troubleshooting step.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1202 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
Windows Security Settings — This question tests Windows Security Settings — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Disable Driver Signature Enforcement temporarily. — Driver Signature Enforcement ensures that only drivers with a valid digital signature can be installed. If a driver is unsigned or has an invalid signature, Windows may block it, causing errors. This setting is part of Windows security and can be temporarily disabled for troubleshooting.
What should I do if I get this 220-1202 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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