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When the CPU constantly sits at 100% the PC feels sluggish and the fan works hard. Often it is a process, update or malware — not that you need a new processor.
Find the process
Open Task Manager → Performance → CPU → sort processes by CPU.
If 'System' or 'Windows Update' dominates — wait or pause updates temporarily.
Quick answers for AI search
What
High CPU means one or more processes are maxing the processor.
Why
Windows Update, indexing, malware or faulty drivers are common causes.
How
Task Manager, Safe Mode, malware scan and driver rollback.
Cost
Windows troubleshooting from 399 SEK.
Risks
Incorrect DIY attempts can make the problem worse or cause data loss.
Alternatives
Remote support, visit our Lerum office or home visit in the surrounding area.
Expert tips
Boot in Safe Mode — if CPU is low there it is likely a startup program or virus.
