How to speed up my computer: answer three questions first

Most guides on this subject hand you twenty things to try. That is overwhelming, and it means nineteen of them are aimed at a problem you do not have.

Three questions get you to the one that matters. Answer them in order.

1. Does it freeze when you switch between windows?

You are working normally, you click another program, and everything stops for a few seconds before catching up.

If yes, you are out of memory. When the machine runs out of RAM it starts moving data to the hard drive to make room, and pulling it back is what you are waiting for.

The fix is to use less memory in whatever is using the most, and on almost every computer that is the web browser. Not because browsers are wasteful, but because thirty open tabs are thirty running programs. You do not have to close them — Chrome can hand back a tab's memory while keeping the tab open, which takes seconds and often solves the whole thing.

2. Is it slow from the moment it starts?

Booting takes minutes. Programs take many seconds to open. It has been like this for a long time, rather than starting recently.

If yes, it is the hard drive. Older computers with a mechanical drive — the kind with spinning parts — are slow at everything by nature. Replacing it with an SSD is the single biggest improvement available, usually for well under a hundred euros, and it makes an eight-year-old machine feel new.

If it already has an SSD, check how full it is. Under about 10% free, every computer slows down. Getting back to 15% free is free.

3. Is it fine at first and slower after an hour?

Fast in the morning, sluggish by mid-afternoon. Worse on a sofa or a bed than on a desk. The fan is loud.

If yes, it is heat. Processors slow themselves down on purpose to avoid damage. The cause is nearly always blocked vents or years of dust inside. Use it on a hard surface, keep the vents clear, and on an older machine consider having it cleaned out.

If you answered no to all three

Then something specific is misbehaving rather than the machine being generally tired. Open Task Manager on Windows with Ctrl + Shift + Esc, or Activity Monitor on a Mac, and sort by CPU. If one thing sits at the top while you are doing nothing, that is your answer — look up its name before closing it.

Two things worth doing regardless

Trim what starts automatically. Windows: Task Manager → Startup apps. Mac: System Settings → General → Login Items. Turn off what you recognise and do not need every day. Those programs still open when you click them.

Restart once a week. Unglamorous, genuinely effective, and it costs two minutes.

That is the whole method. If you want the longer version, the full checklist ordered by payoff covers everything worth trying, and nothing that is not.