Adware

2.4 Summarize types of malware and tools/methods for detection, removal, and prevention.

📘CompTIA A+ Core 2 (220-1202)

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Definition:
Adware is a type of software that automatically displays or downloads advertisements on your computer or device. Its main goal is usually to generate revenue for the software developer through ads.

Key Points for the Exam:

1. Purpose:
   • Shows ads to the user, often in pop-ups, banners, or even in browsers.
   • Can track your online activity to show targeted advertisements (like which websites you visit or what you search for).
2. How It Affects Systems:
   • Slows down the system because of extra background processes.
   • Can create security risks if it tracks sensitive information like login credentials.
   • Often bundled with free software. When installing a program, adware may be included unless you opt out.
3. Detection:
   • Can be detected using antivirus or anti-malware software.
   • Look for unusual pop-ups, browser changes (like new toolbars or homepage redirects), or excessive ads.
4. Removal:
   • Use specialized anti-malware tools (Windows Defender, Malwarebytes, or similar software).
   • Manual removal might involve uninstalling suspicious programs or browser extensions.
5. Prevention:
   • Be careful when downloading free programs; always read installation prompts.
   • Use reputable sources for software.
   • Keep antivirus software updated.

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Potentially Unwanted Programs (PUPs)

Definition:
A PUP is software that may appear useful but often causes problems or unwanted behavior on your system. Not all PUPs are malicious, but they can negatively affect system performance or privacy.

Key Points for the Exam:

1. Purpose:
   • Sometimes installs alongside other software without clear user consent.
   • May include adware, toolbars, or extra programs that you didn’t want.
2. How It Affects Systems:
   • Slows down computer performance.
   • Can create pop-ups or unwanted browser changes.
   • May collect user data or track online activity.
3. Detection:
   • Antivirus software can flag PUPs during scans.
   • Some PUPs are detected as low-risk or moderate-risk software.
4. Removal:
   • Use anti-malware software to scan and remove PUPs.
   • Manual removal involves uninstalling the program from the system settings or removing suspicious browser extensions.
5. Prevention:
   • Always choose custom installation when installing software to avoid hidden PUPs.
   • Avoid clicking “Next” repeatedly without reading prompts.
   • Keep your OS and antivirus updated to block PUP installations.

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Exam Tips:

• Adware and PUPs are not always classified as viruses, but they are still malware-related threats.
• Key difference: Adware focuses on ads, whereas a PUP can have a broader impact (slow performance, privacy risks, unwanted software).
• Know detection, removal, and prevention methods for both.

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✅ Quick Summary Table for Study:

Term	Definition	Effect	Detection	Removal/Prevention
Adware	Software that shows ads	Slows PC, privacy risk	Antivirus, unusual ads	Anti-malware, careful installs
PUP	Software user may not want	Slows PC, may include adware	Antivirus, suspicious programs	Anti-malware, uninstall, custom install