Malware · high

How to fixCRYPTOMINER-HIGH-CPU

Cryptominer malware (high CPU/GPU usage)

What this error means

Cryptominer malware (high CPU/GPU usage) is a high-severity malware/security issue. A cryptocurrency mining malware is silently consuming CPU and GPU resources. Symptoms include unexplained 100% CPU or GPU utilization, elevated electricity consumption, fan noise during idle periods, and system slowdowns. Miners often disguise themselves as system processes or inject into legitimate processes like svchost.exe or browser extensions. It's also often linked to trojanized software download. Use the steps below to track down and fix the cause.

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Run full scan with Malwarebytes Anti-Malware
  1. Run full scan with Malwarebytes Anti-Malware
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Check Task Manager for unknown high-CPU processes
  1. Check Task Manager for unknown high-CPU processes
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Remove suspicious browser extensions
  1. Remove suspicious browser extensions
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Malicious browser extension installing miner
  • Trojanized software download
  • Drive-by mining script via compromised website