Digital & Data
Computer suddenly running very slow: what to do?
Computer suddenly running very slow: the right reflexes in a few simple steps.
Written by Mohamed IDBRAHIM · Updated octubre 13, 2026 · 7 min read
Immediate actions
- 1 Open task manager and find resource hogs.
- 2 Run a malware scan with updated definitions.
- 3 Keep at least 15 percent disk free.
- 4 Disable unnecessary startup programs.
What not to do / warning
Cryptominers hide in browsers and eat CPU silently.
When a computer suddenly running very slow happens, the first minutes matter. Follow these steps to act safely and without panic.
What to do right now
- Open task manager and find resource hogs.
- Run a malware scan with updated definitions.
- Keep at least 15 percent disk free.
- Disable unnecessary startup programs.
Mistakes to avoid
- Acting before removing the immediate source of danger.
- Panicking or skipping the official procedures.
- Following unverified advice from random websites.
How to prevent this in the future
Regular checks, keeping emergency numbers visible and preparing an essentials kit go a long way. Save this guide for offline access.
Frequently asked questions
What should I do first?
Ensure everyone is safe, remove the source of danger, then call the relevant number or begin the official procedure.
When should I call emergency services?
Whenever life, serious injury or fire is involved. When in doubt, call — dispatchers would rather check than miss an emergency.
Sources & references
- CISA (https://www.cisa.gov/)