Laptop Running Slow? 9 Fixes to Try Before You Call a Technician
A slow laptop isn't always a dying laptop. These nine checks fix most slowdowns in under an hour, and tell you when it really is time for an upgrade or a repair.
“My laptop has become very slow” is probably the most common sentence we hear at our service desk. The good news: most slowdowns have simple causes, and many can be fixed at home. Work through these steps in order.
1. Restart properly
It sounds obvious, but Windows’ “Fast Startup” means shutting down doesn’t fully reset the system. Use Restart instead of Shut Down, and do it at least once every few days.
2. Cut down startup apps
Open Task Manager → Startup apps and disable anything you don’t need running the moment you log in: chat apps, updaters, cloud sync tools you rarely use. This alone can cut boot time in half on many machines.
3. Check what’s eating resources
In Task Manager’s Processes tab, sort by CPU, Memory and Disk. If one browser tab or app is consistently at the top, that’s your culprit. If Disk is at 100% most of the time on a laptop with a hard disk (HDD), skip ahead to step 7.
4. Free up storage
Windows needs free space to work well. Aim to keep at least 15–20% of your main drive free. Use Settings → System → Storage → Cleanup recommendations, empty your Downloads folder, and move old photos and videos to an external drive or cloud storage.
5. Scan for malware
Run a full scan with Windows Security (or your installed antivirus). Also check your browser for extensions you don’t recognise. Adware extensions are a common cause of slow browsing.
6. Check for overheating
If your laptop is fast when cold and slows down after 15–20 minutes, it’s probably thermal throttling: the processor deliberately slows itself to avoid overheating. Signs include a loud fan, hot keyboard area, and hot air from the vents. Use it on a hard, flat surface, never on a bed or pillow. If the problem persists, the fan and heatsink likely need professional cleaning and fresh thermal paste.
7. Upgrade to an SSD
If your laptop still has a traditional hard disk, this is the single biggest upgrade you can make. Replacing an HDD with an SSD routinely makes an older laptop feel faster than a new budget one: boot times drop from minutes to seconds. Your data and Windows installation can be cloned over, so you don’t lose anything.
8. Add more RAM
For everyday work with a browser, Office and video calls, 8GB is a practical minimum today and 16GB is comfortable. Many laptops have a spare slot or replaceable memory. Some newer thin laptops have RAM soldered to the board, so check before buying.
9. Update, then consider a clean install
Install pending Windows and driver updates. If the laptop is still slow after all the steps above and the hardware checks out, a clean reinstall of Windows (after backing up your data) often restores it to like-new performance.
When to call a technician
Bring it in if you notice any of these:
- Clicking or grinding sounds from the laptop
- Frequent blue screens or sudden shutdowns
- The battery is swollen (the trackpad or case is bulging). Stop using it immediately.
- Overheating continues even after cleaning the vents
- Warnings about disk health or “repairing disk errors” on boot
At King Computers, our technicians diagnose slow laptops, do SSD and RAM upgrades, thermal servicing and clean OS installations. Contact us or drop by our Lower Parel store.