A slow computer sends people to Google, and Google sends them to pages promising a free download that will "clean, optimise and speed up" their PC. It is one of the most common ways a slow-but-healthy computer becomes a slow-and-infected one, and we see the aftermath in the workshop every week.
Why the promise does not hold up
Windows has cleaned up after itself perfectly well for a decade. The things these tools claim to fix — registry clutter, temporary files, "junk" — have almost no effect on speed on a modern system. Deleting ten thousand registry entries saves you nothing you can feel, because the registry is not why your computer is slow.
What the tools do reliably deliver:
- A permanent resident. They install themselves to run at startup — adding to the exact problem you downloaded them to fix.
- Scare results. "4,812 issues found!" is the sales pitch for the paid version, not a diagnosis. The number is meaningless by design.
- Bundled extras. Toolbars, browser hijackers, a second "driver updater" you never asked for.
- And sometimes, actual malware. Some of the most-advertised cleaners are the infection. The ad budget is funded by what happens after you install.
Driver-updater tools deserve a special mention: Windows Update already handles drivers, and a wrong "updated" driver from a third-party tool is a classic cause of crashes that were not happening before.
What actually makes a slow computer faster
The honest list is short:
- Trim what runs at startup. Ctrl+Shift+Esc → Start-up tab → disable what you don't need immediately. This is the single biggest everyday win, and it is built into Windows.
- Free up disk space if the drive is nearly full — under about 15% free, Windows visibly slows.
- Let updates finish. A machine stuck half-way through updates runs badly until they complete.
- If it is still slow, the cause is usually physical: an ageing hard drive that should be an SSD, not enough memory, or a machine full of dust running hot. No download fixes hardware.
Our computer clean-up and tune-up covers all of this — including telling you plainly when the honest answer is an SSD or more memory rather than a clean-up, and quoting that instead. If the slowness arrived suddenly rather than gradually, read our guide on why computers get slow — sudden slowness has different causes, and one of them is a failing drive that wants attention today, not eventually.
The rule of thumb
If software advertises that it will speed up your computer, the safest assumption is that it will do the opposite. The tools that genuinely help are already inside Windows — and the problems they can't fix are physical ones that no download can reach.
Rather someone just fixed it?
Call us and describe what is happening. We will tell you what it is likely to be and what it would involve — before you commit to anything.
Written by the technicians at Afford IT, Indooroopilly. We service homes and small businesses across Greater Brisbane.