Guides Maintenance
Speeding up a slow computer, honestly
Most slowness has three or four ordinary causes. None of them need software that promises to make your PC fast again.
Start with free disk space
A nearly full drive slows everything, because the system has no room to work. Aim to keep a comfortable margin free. Both Windows and macOS include tools that show what is using space and offer to remove the safe categories.
The usual culprits are downloads nobody revisited, old system update files, and duplicated media. Deleting those is safe; hunting through system folders by hand is not.
Reduce what starts automatically
Programs that launch at login stay in memory all day. Windows lists them in Task Manager under Startup; macOS under General, then Login Items. Turning off what you do not need every day is the single most noticeable change on most machines.
Look at the browser before the computer
For most people the browser is the computer. Dozens of open tabs consume real memory, and extensions run on every page you load. Closing what you are not reading and removing extensions you no longer use often resolves what felt like a hardware problem.
Check for the obvious hardware limits
A mechanical hard drive is dramatically slower than a solid-state one, and replacing it is usually the largest improvement available to an older machine. Insufficient memory shows as heavy disk activity when switching between programs. Both are visible in the system's own activity monitor.
Heat
A machine that is hot will deliberately slow itself to avoid damage. If a laptop is loud and warm and slow together, dust in the vents is a more likely explanation than software. This is a cleaning job, not a download.
About cleaner and optimiser software
Claims in this category are the most inflated in consumer software. Deleting temporary files and managing startup items are both things the operating system already does and already exposes. Registry cleaning has little measurable benefit on modern Windows and carries some risk.
Software promising dramatic speed increases is usually selling the two actions above, sometimes after a free scan that reports an alarming number of "issues" - a count with no agreed definition behind it.