Why Is My Laptop Suddenly So Slow?

Nothing died. No blue screen, no weird noise, no error message. It just takes forty seconds to open a browser now instead of five, and nobody can tell you why. Here's how I actually track that down when someone brings one in.

The first thing I check isn't glamorous: how full is the drive. Once a hard drive or SSD gets past 90% full, Windows slows down noticeably because it doesn't have room to write temp files where it wants to. I've had people convinced their laptop was dying when the real problem was 400 GB of old phone photo backups nobody remembered making.

After that, startup programs. Every printer utility, every chat app, every "helper" tool installed two years ago and forgotten wants to load the instant you turn the machine on. I regularly open Task Manager on a customer's laptop and count twenty-plus things fighting for the same CPU and RAM before a browser's even open. Disabling the ones you don't recognize costs nothing and takes about ten seconds.

Browser tabs matter more than people think, too. Thirty tabs and a dozen extensions isn't just clutter, it's RAM being eaten around the clock, and Chrome is especially bad about it.

I check all three of those before touching anything else, because they solve more "why is this suddenly slow" complaints than people expect, and they're free.

If none of that explains it, and the slowdown showed up fast, over a day or two instead of drifting in over months, I start suspecting malware instead of wear. A laptop that was fine Monday and crawling by Wednesday, especially with the fan running loud while you're doing nothing demanding, usually has something running in the background it shouldn't be. Removal starts at $80, and it's worth ruling out first. No amount of RAM or SSD upgrade fixes a machine quietly mining currency for somebody else.

If the machine is still on a spinning hard drive, that's probably your actual answer, not age, not clutter, the drive. Swapping it for an SSD is the single biggest speed change I make in this shop. Boot times drop from minutes to seconds, and the ten-second hangs just stop happening. Labour plus a decent drive runs around $120 all-in on the low end. On a four or five year old machine, that's usually the difference between "time for a new laptop" and "this feels new again."

Already on an SSD and still slow? RAM's next. Eight gigs was fine in 2019. In 2026, Chrome, a PDF, and a video call at the same time is already enough to make the system swap to disk, and that's what slow actually feels like. RAM upgrades run $50 to $150 with parts, assuming the laptop allows it. Some thin ones solder it to the board, which a free diagnostic tells you before you spend anything.

And sometimes the honest answer is that the laptop's just old. Soldered storage, a processor two generations behind, a battery that's starting to swell, no upgrade fixes that. That's a replacement conversation, and I'll say so instead of selling you a $150 fix that won't actually change how it feels to use.

Bring it in, the diagnostic's free. If it's a quick fix, that's what you'll pay for. If it isn't worth fixing, you'll know that before you spend a dollar either way.