Chapter 1
Operating Systems
Course: 220 1202 Comptia A Exam Core 2
Subject: 220 1102 Comptia A Plus Exam Core 2
Chapter: Software Troubleshooting
1. Common Symptoms
1.1 Unable to Access the Network
- Description: Users may be unable to connect to the internet or internal networks, indicating potential security issues such as malware, misconfigured settings, or firewall blocks.
- Common Causes: Malware that blocks network access, changes to DNS settings, firewall rules, or network misconfigurations.
- Real-Life Example: A computer infected with malware that redirects network traffic or modifies DNS settings may prevent access to specific sites or the entire network.
1.2 Desktop Alerts
- Description: Frequent or unusual desktop alerts may appear, potentially indicating malware infections, fake antivirus warnings, or legitimate security software notifications.
- Real-Life Example: A user receives repeated warnings from a legitimate antivirus program about detected threats, or from rogue software that claims the system is infected to trick users into buying fake protection.