Issue Description
Malware and potentially unwanted programs (PUPs) can slow down Windows, display ads, steal data, or compromise security.
Common Causes
- Installing free software bundles
- Clicking malicious ads or links
- Disabled or outdated antivirus protection
Step-by-Step Solution
Step 1: Disconnect From the Internet
- Unplug Ethernet or turn off Wi-Fi
- This prevents malware from communicating externally
Step 2: Run Microsoft Defender Full Scan
- Open Windows Security → Virus & threat protection
- Click Scan options
- Select Full scan → Scan now
- Wait for scan completion and remove detected threats
Step 3: Run Offline Scan (Recommended)
- In Scan options, choose Microsoft Defender Offline scan
- Click Scan now
- PC will restart and scan before Windows loads
Step 4: Remove Suspicious Programs
- Open Settings → Apps → Installed apps
- Uninstall unknown or suspicious software
- Restart the PC
Step 5: Check Browser Extensions
- Open your browser
- Remove unfamiliar extensions
- Reset browser settings if needed
Explore Further
- Use reputable second-opinion scanners
- Review startup programs for suspicious entries
Prevention & Best Practices
Avoid bundled installers and keep antivirus enabled at all times.