Computer is slow and CPU usage is stuck at 100%
High CPU usage means one process is hogging all computing power. Open Task Manager, find which one, and stop it.
When CPU usage is above 80%, something is monopolizing your processor. Task Manager shows what's using it. Stop the process and your computer runs normally again.
Risk: Medium
⏱ 20–40 minutes
Intermediate
⚡ Before you start
- ✓Have Task Manager ready to check CPU usage
- ✓Be ready to identify processes by name
- ✓Know that Windows Update and antivirus can legitimately use high CPU
Fix-IT-Bot will walk you through each step, just tap, no typing needed.
Skip, I just want a technicianCommon mistakes to avoid
- Ending a Windows system process thinking it's malware — stick to third-party apps
- Forcing a shutdown while CPU is maxed — let the process finish or stop it properly
- Not checking Task Manager first — always identify the culprit before stopping anything
Signs you need professional help
- If CPU stays at 100% even after stopping all visible processes, or if multiple unknown processes are running, contact us for malware scan and hardware diagnostics. If you see random processes with names like system32.exe or svchost.exe in suspicious locations, that's malware.
Book a technician
We can fix most issues remotely in 15 minutes. Book your weekend slot and we handle the rest.
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