Slow Computer: 12 Fixes That Actually Work
Published on September 29, 2026
A slow computer is, by far, the number one reason people contact us. The good news: most of the time you don't need to buy anything new. Here are 12 things that actually make a difference, in the order we usually try them ourselves.
1. Actually restart it, don't just close the lid
Closing a laptop's lid puts it to sleep, not a restart. A full shutdown and startup, every so often, clears out processes that have been stuck running in the background for days or weeks.
2. Check what's launching with you
Plenty of programs quietly add themselves to your startup list and keep running in the background without you noticing. Turning off the ones you don't need from Task Manager (or System Preferences on a Mac) usually shows results immediately.
3. Update the OS and drivers
An update you've been putting off for months isn't just a security risk — it can include real performance improvements, especially for graphics and disk drivers.
4. Free up disk space
With the disk nearly full, the system has no room for temp files or virtual memory, and everything slows down. Clearing out old downloads, the trash, and duplicate files usually frees up more space than people expect.
5. Check for hidden malware
A computer that suddenly gets much slower, without you changing anything, is one of the classic signs of malware running in the background (see our full list in our post on virus warning signs).
6. Close tabs and programs you're not using
Every open browser tab eats memory on its own. Ten or twenty forgotten tabs can, without exaggeration, be the main cause of the slowdown.
7. Check the actual health of your hard drive
A mechanical hard drive (HDD) that's starting to fail slows down long before it stops working entirely — odd noises or load times that get worse week by week are a warning sign worth checking before you lose data.
8. Turn down the visual effects
System animations and transparency effects have a small but real performance cost, especially on a computer that's a few years old already. Turning them off is free and reversible any time.
9. Check dust and airflow
An overheating computer deliberately slows itself down to protect itself (thermal throttling). A laptop with dusty vents, or sitting on a soft surface, is more common than you'd think.
10. Add RAM if your machine supports it
If everything slows down together when you open several programs at once, you're probably running low on RAM. On many desktops (and some laptops) it's a simple upgrade with a noticeable impact.
11. Switch to an SSD if you're still on a mechanical drive
By far the single most noticeable performance upgrade available for an older computer — it often feels like a brand-new machine, for a fraction of the price of one.
12. When none of this is enough
If you've already tried all of the above and it's still slow, the diagnosis may need to go deeper (specific processes, actual temperatures, a more thorough malware scan) — that's what a technician is for.
If you'd rather have someone check it for you instead of working through this list yourself, our Diagnostic tier ($29) is exactly that: a technician reviews your computer remotely and tells you exactly what's going on, with the guarantee that if it doesn't get fixed, you don't pay.
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