Fix a Laptop That's Overheating and Running Slow

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Overheating and slowness are usually linked — thermal throttling kills performance. The culprit is almost always dust clogging vents or a CPU under heavy load. Fix path: free diagnostics → cheap cleaning → advanced thermal fixes.

Step 1: Diagnose (Free)

1. Download HWiNFO (free) and check CPU/GPU temps under load. Healthy = under 80°C; throttling = 90°C+
2. Open Task Manager (Ctrl+Shift+Esc) → Performance tab. If CPU/RAM constantly near 100%, you have a background process problem
3. Check disk usage in Task Manager → Processes. Windows Search indexing or antivirus scans can max out slow drives

Step 2: Quick Wins (Free-$15)

1. Disable unnecessary startup programs (Task Manager → Startup tab)
2. Elevate laptop back edge 2-3cm with a stand for airflow
3. Close browser tabs — Chrome is a RAM hog
4. Run Windows Update and install latest chipset drivers from your manufacturer's support page

Step 3: Clean the Vents ($15-40)

1. Shut down completely (not sleep). Wait 5 minutes
2. Use electric air duster to blow dust out of vents, keyboard, and fan intake. Do 2-3 short bursts, 5 seconds apart (rapid fire can damage fan bearings)
3. If you hear rattling inside, the fan may be dying — consider replacement next

Step 4: Advanced ($20-60, only if still throttling)

1. If laptop is 3+ years old, thermal paste between CPU and heatsink has degraded. Reapply Arctic MX-5 or Noctua NT-H1 (requires disassembly — watch a model-specific YouTube video first)
2. Replace the fan if it's noisy or stalls (check compatibility with your exact model)

When to call for help: If after cleaning temps still hit 95°C+ at idle, the heatsink may be loose or the fan is failing — a service depot can diagnose in 30 minutes for ~$60.

Pro tip: Set a custom power plan in Windows (Settings → Power & Battery → Power Plans) to "Balanced" or "Power Saver" during non-gaming use. This reduces CPU/GPU clock speed and heat with <5% performance loss for everyday tasks. Use "High Performance" only when gaming or video editing.