Your computer was fine yesterday and now it crawls. Usually it's one of a few common causes. Before you spend money on a new one, work through these from easiest to hardest.
Step 1: The usual suspects
1. Restart it (yes, really)
"Have you tried turning it off and on again" sounds like a joke, but it's genuinely the most effective first step. Leaving a machine on for weeks lets memory fill with junk and stuck processes hold onto resources. Do a full restart — not sleep or hibernate.
2. Check if your storage is full
A full drive slows everything down because the system can't use temporary space.
- Windows: Settings → System → Storage
- Mac: System Settings → General → Storage
- Keep at least 10–15% free. Start with the Downloads folder and Trash
3. Trim your startup programs
Too many apps launching at boot means it's slow from the moment you turn it on.
- Windows: Ctrl+Shift+Esc → Task Manager → Startup apps tab → disable what you don't need
- Mac: System Settings → General → Login Items
Step 2: Find what's eating your resources
- Windows: Ctrl + Shift + Esc → Task Manager
- Mac: Activity Monitor (search it in Spotlight)
Sort by CPU, Memory, and Disk usage — highest first.
| If this is high | What it means |
|---|---|
| CPU near 100% | A program is running wild. Could be too many browser tabs, or an antivirus scan |
| Memory nearly full | Too many apps open — or you simply need more RAM |
| Disk at 100% | Background updates/backups running, or an aging hard drive (HDD) |
The browser is often the culprit. Dozens of open tabs eat enormous amounts of memory. Try disabling extensions one by one too — especially old ones.
Step 3: Still slow?
4. Check for updates
Outdated OS and drivers can cause performance problems. That said, it's normal to be slow while an update is installing — let it finish first.
5. Scan for malware
A sudden slowdown can mean malware. On Windows, run a full scan with Windows Security (built in). Don't install multiple antivirus programs — they conflict and make things slower.
6. Check for overheating
When dust traps heat, the computer throttles itself to stay safe. Suspect this if the laptop base is hot or the fan runs loudly all the time.
- Don't block the vents — use it on a hard surface (not a blanket or your lap)
- Clear dust from the vents (compressed air)
Step 4: When it's the hardware
- Swap HDD for SSD — on an older machine this is by far the biggest upgrade you'll feel. Boot and load times improve dramatically
- Add RAM — worth considering if memory is constantly above 90%
Order matters. Restart → storage → startup apps → task manager → malware/heat. Follow that sequence and most slowdowns get fixed without spending a cent.
Eight out of ten slow computers come down to full storage, too many startup apps, or browser tabs. Check those before buying a new one.
