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What to Do If Your Device Is Showing Unusual Behavior

PT

Target Audience: Iscte Community

Signs of Suspicious Behavior

Common indicators that your device may be experiencing a security issue include:

    • Sudden slowness or abnormal performance
    • Frequent crashes or unexpected errors
    • Unusual pop-ups, advertisements, or warning messages
    • Redirects to unknown or unexpected websites
    • Changes to browser settings (such as the homepage or search engine)
    • Unknown or unfamiliar programs and applications appearing on the device

Answer/Solution:

📡 Disconnect the Device from the Internet (If Necessary)  → This helps reduce the risk of data transmission or remote control by malicious actors

    • Disable Wi-Fi or disconnect the network cable
    • Avoid communicating with external systems until the issue has been assessed

🛑 Avoid Continuing to Use the Device  → This helps prevent a potential compromise from worsening

    • Do not access institutional applications or services
    • Do not enter usernames, passwords, or other credentials
    • Avoid performing sensitive activities, such as financial transactions or accessing confidential information

⚠️ Check Security Alerts  → Security notifications may provide useful information about the cause of the problem

    • Review alerts from the operating system, antivirus software, or endpoint protection tools.
    • Identify any detected threats or suspicious activity
    • Do not ignore critical security warnings

📸 Record Relevant Information  → This information can assist technical teams with diagnosis and investigation

    • Take screenshots of any unusual behavior or error messages
    • Note:
      • When the issue started
      • What actions were being performed at the time
    • Identify any applications, websites, or files involved

📣 Contact Technical Support  → Prompt reporting enables timely technical intervention and helps protect both the device and the wider community

    • Report the issue as soon as possible
    • Include:
      • The symptoms observed
      • When they occurred
      • Any actions already taken

Further Information:

Even if the issue is ultimately not confirmed as a security incident, it should still be reported. Early reporting helps prevent future problems and contributes to the overall security of institutional systems.

See also:

See also: