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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