How can I speed up my computer? Pick by how much time you have

The right answer depends less on your computer than on what you can spend right now. Here are three plans. Each one is complete — start with the first, and only move on if it did not work.

Five minutes

This is the plan that fixes most machines, which is why it is first rather than last.

1. Release what your tabs hold. A browser open all week is usually the largest consumer on the machine. Chrome can hand a tab's memory back while leaving the tab in place — how.
2. Find anything pinning the CPU. Task Manager (Ctrl + Shift + Esc) or Activity Monitor, sorted by CPU. One process at the top while you do nothing is a stuck process.
3. Restart, if you have not this week. Clears leaked memory and pending updates.

If the machine feels normal now, stop. You are done, and nothing further on this page will help more.

One hour

For a machine that is still slow, or that gets slow again within days.

1. Cut the startup list. Windows: Task Manager → Startup apps. macOS: System Settings → General → Login Items. Everything here holds memory all day whether you use it or not.
2. Audit browser extensions. They run inside every page, so their cost multiplies by tab count. Setting them to run on click rather than everywhere is often the biggest single saving — how to measure them.
3. Free up disk space. Below 10% free, everything slows down. Aim for 15%.
4. Uninstall what you stopped using — mainly for the background services that came with it.
5. Clear the vents. If it is fast for twenty minutes and slow after an hour, this is your problem and no setting will fix it.

A weekend, and some money

Only worth it once you know which resource is short. Diagnose first — memory, CPU, disk or heat — because buying the wrong upgrade is the expensive mistake in this category.

• An SSD if it still has a mechanical hard drive. The largest single improvement available to an older machine.
• More RAM if, and only if, the system is currently paging to disk. Check whether your model allows it — many recent laptops solder memory down.
• A professional clean for an older laptop that overheats. Cheap, and it addresses something software cannot.

The five minutes that stop it coming back

Whichever plan you used, the machine will fill up again — tabs accumulate, startup lists regrow. Automating the browser cleanup is the one change that makes the fix permanent rather than seasonal, and it is the last five minutes worth spending on this.