PC running very slowly due to malware

4.5

Your computer is laggy because a virus is using up all the resources.

Symptoms
  • High CPU usage
  • Slow boot
  • Apps freezing
Possible Causes
  • Virus scanning your files
  • Botnet activity
  • Crypto-miner

Step-by-Step Fix

1

Check Task Manager

Look for unknown processes using more than 20% CPU.

2

Disconnect Internet

If the lag stops, the malware was communicating with a server.

3

Run Full Scan

Use a reputable antivirus to find the source of the load.

When to See a Technician

Malware often hides its CPU usage by closing itself when you open Task Manager.

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