A computer can feel old long before it actually is.
Maybe it takes forever to start. Apps take longer to open. Your browser becomes sluggish when you have too many tabs open. The fan suddenly sounds like it is working overtime. Sometimes, even opening a folder feels slower than it used to.
The natural response is to start looking at new laptops.
But a slow computer does not always need an upgrade. Sometimes the hardware is fine and the problem is everything happening around it.
Too many apps launching at startup, a nearly full drive, demanding background processes, outdated software or an application using more memory than your computer can comfortably provide can all make an otherwise capable machine feel slow.
If you are wondering how to speed up computer 2026, start with the computer you already own.
First, find out what is actually slowing it down
Before deleting files or changing settings, spend a few minutes figuring out where the problem is.
A computer that takes a long time to start has a different problem from one that becomes slow only when you open several apps. A machine that runs well until the storage fills up needs a different fix from one that constantly struggles with memory.
On Windows, open Task Manager by pressing Ctrl + Shift + Esc.
The Performance section lets you see CPU, memory, disk and network activity. The Processes section shows which apps and processes are consuming those resources.
Microsoft describes Task Manager as a tool for monitoring CPU load, memory usage, disk activity and other system activity. (Microsoft Support)
On a Mac, open Activity Monitor.
You can check CPU, memory, energy and disk activity and identify apps or processes that are putting unusual pressure on the system. Apple specifically recommends Activity Monitor when a Mac is running slowly. (Apple Support)
This first step matters because it stops you from fixing a problem you do not actually have.
Give your computer some breathing room
One of the simplest causes of sluggish performance is a drive that is running out of space.
Your storage drive does more than hold your photos, documents and applications. The operating system and apps also need working space for temporary files, updates, caches and other tasks.
Microsoft notes that low storage can contribute to slower performance and problems installing updates. Windows includes Storage Sense and Cleanup recommendations to help identify files that can be removed. (Microsoft Support)
On Windows 11, go to:
Settings > System > Storage
You can see what is consuming your storage, including installed apps, temporary files and other categories.
Look for things you genuinely no longer need.
Old downloads are a good place to start. So are applications you installed once and never opened again, large videos you have already backed up and duplicate files.
Do not start deleting random system folders just because they look large. The goal is to remove clutter, not create another problem.
On a Mac, go to:
Apple menu > System Settings > General > Storage
macOS provides recommendations for freeing up space and lets you see what is occupying your startup disk. Apple specifically identifies low startup disk space as one possible reason for a slow Mac. (Apple Support)
Stop unnecessary apps from launching when you start the computer
A computer can be slow before you even open anything because several applications are already running.
Cloud storage tools, messaging apps, music players, meeting software, update utilities and other programs can all configure themselves to launch when you sign in.
You may need some of them running automatically.
You probably do not need all of them.
On Windows, open Task Manager > Startup apps.
Look through the list and identify applications you do not need immediately after signing in. Disable the ones you recognise and rarely use.
Be careful with anything you do not recognise. A startup entry may belong to a driver, security tool or another important component.
Windows also provides startup controls through Settings, allowing you to manage which apps launch automatically. (Microsoft Support)
On a Mac, go to:
System Settings > General > Login Items & Extensions
From there, you can manage applications that open at login and apps that are allowed to perform activities in the background. Apple notes that background apps can affect Mac performance. (Apple Support)
The difference can be noticeable, particularly on older computers.
Instead of starting your day with ten programs competing for resources, your computer can start with the things you actually need.
Close what you are not using
This sounds obvious, but it is easy to forget how much we leave running.
You might have Chrome with 30 tabs open, Photoshop sitting in the background, Spotify playing, a video call application waiting for a meeting and several documents open.
Each one consumes resources.
You do not need to close everything constantly. Modern operating systems are designed to manage multiple applications.
But if your computer is struggling, look at what is actually running before assuming the hardware is too old.
On Windows, Task Manager can show which applications are consuming the most CPU or memory.
On Mac, Activity Monitor provides similar information, including memory pressure and which apps are consuming memory. (Apple Support)
If one application is consistently consuming an unusual amount of resources, close it and see whether performance improves.
That can tell you more than installing a generic “PC booster” ever will.
Your browser could be the problem
Sometimes the computer is not slow. Your browser is.
Browsers can accumulate dozens of open tabs, extensions and background processes. If you work almost entirely in a browser, that can have a significant effect on how responsive the computer feels.
Start by closing tabs you no longer need.
Then look through your browser extensions.
If you installed an extension for something you did once six months ago, remove it. If you have several extensions doing similar things, keep the one you actually use.
You can also try reproducing the problem in a private browsing window or another browser.
If the computer suddenly feels much faster, the browser environment may be contributing to the problem.
Update your operating system and apps
Updates are not only about new features.
They can also include bug fixes, security improvements, driver updates and compatibility changes.
If your computer is running an outdated operating system or an application that has a known performance problem, updating may help.
Windows Update is the obvious place to start on a Windows PC.
On a Mac, check System Settings > General > Software Update.
You should also keep frequently used applications updated.
There is no need to install every random driver updater or system optimisation utility that appears in an advertisement. Your operating system already provides tools for many of the maintenance tasks your computer needs.
Check your memory before blaming the processor
If your computer becomes painfully slow whenever you open several applications, RAM may be the issue.
RAM is the short-term workspace your computer uses while applications are running. If you regularly run out of available memory, the system has to work harder to keep everything going.
Windows Task Manager can show memory usage.
On Mac, Activity Monitor provides a Memory Pressure graph. Apple says green indicates that memory is being used efficiently, while yellow or red can indicate that the system is under greater memory pressure. (Apple Support)
This is more useful than simply looking at how much RAM is “free”.
Modern operating systems deliberately use available memory for caching and other tasks. Seeing a large amount of memory in use does not automatically mean something is wrong.
What matters is whether your workload is consistently pushing the system beyond what the available memory can comfortably handle.
If it is, closing demanding apps can help.
If it happens constantly, a RAM upgrade may be worth considering on a computer that supports one. Some modern laptops have memory permanently built into the motherboard, so upgrading may not be possible.
Give your storage drive some attention
Storage does not just determine how many files you can keep.
The type and condition of the drive can also affect how quickly the computer starts, opens applications and handles files.
If your computer still uses a traditional hard disk drive, moving to an SSD can produce a much bigger improvement than many software tweaks.
But you do not need to replace the drive simply because the computer feels slow.
First, check what you have.
On Windows, you can see connected drives and their types through Storage settings and related system information. Microsoft also provides a built-in drive optimisation tool. (Microsoft Support)
Windows handles optimisation differently depending on the drive. Traditional hard drives can be defragmented, while SSDs use a process called TRIM to help manage storage efficiently. (Microsoft Support)
That means you should not treat every drive as if it needs the same maintenance.
And avoid downloading a third party “defragmenter” or “SSD optimiser” simply because it promises dramatic speed gains.
Your operating system already knows how to manage its supported storage devices.
Restart the computer properly
There is a reason the classic “have you tried turning it off and on again?” advice has survived for so long.
A restart closes running processes, clears temporary states and gives the operating system a fresh session.
If you normally close the laptop lid at the end of the day and rarely restart it, try restarting it when performance starts to deteriorate.
This will not fix a failing hard drive or insufficient RAM.
But it can clear a temporary problem caused by an application or process that has been running for too long.
If performance becomes slow again shortly after every restart, that pattern is useful information. It suggests you should look for the application or process that gradually consumes resources.
Check for malware
Malware can affect performance as well as security.
An unwanted program running in the background can consume CPU, memory, storage or network resources without making its presence obvious.
Windows includes Microsoft Defender through Windows Security, so you do not need to immediately install another antivirus application just because your computer feels slow.
Run a security scan if you notice unusual behaviour, especially if your computer has suddenly become slow alongside unexpected pop-ups, unfamiliar applications or unusual network activity.
Microsoft also recommends antivirus scanning when malware may be contributing to storage or system problems. (Microsoft Support)
The bigger lesson is to avoid downloading random “computer cleaner” software while trying to fix a slow computer. Some of these programs create more clutter than they remove.
Reduce visual effects if your computer is struggling
If you are using an older Windows PC, reducing some visual effects can make the interface feel more responsive.
Windows provides performance settings that let you adjust visual effects in favour of performance. Microsoft also provides advanced performance settings for managing virtual memory and other system behaviour. (Microsoft Support)
This will not magically make an old processor faster.
It simply reduces some of the work required to render the interface.
Think of it as making the computer’s workload lighter rather than making the hardware more powerful.
Keep the computer cool
Heat can become a performance problem.
If the fan is constantly running, the computer becomes unusually hot or performance drops during demanding tasks, check the airflow around the machine.
Do not use a laptop on a bed, duvet or other soft surface that can block its vents.
Keep vents clear of dust where appropriate, and make sure the computer has enough room to move air.
A desktop that has accumulated years of dust inside the case may also need a proper clean.
If the machine gets extremely hot or the fan suddenly behaves differently from normal, treat that as a possible hardware issue rather than simply a speed problem.
Microsoft lists frequent fan activity, heat-related behaviour, slow startup and consistently high CPU, memory or disk usage among signs that a PC may need further attention. (Microsoft Support)
Do not install a dozen optimisation apps
This is perhaps the biggest trap in the entire process.
Search for “speed up my PC” and you will find plenty of software promising to clean your registry, boost your RAM, repair hundreds of errors and make your computer run like new.
You rarely need all of that.
Modern Windows and macOS already include tools for storage management, startup control, process monitoring, security and drive optimisation.
Start with those.
If you understand what is slowing your computer down, you can make a specific change and see whether it works.
That is much safer than letting an unknown program make dozens of changes at once.
When software fixes are no longer enough
Sometimes the computer really has reached its limits.
If you have cleared unnecessary files, reduced startup programs, checked resource usage, updated your software and dealt with obvious problems, but the computer still struggles with the work you need it to do, the hardware may be the limiting factor.
That does not necessarily mean you need a completely new computer.
Depending on the machine, upgrading from a hard drive to an SSD can make a major difference. Adding RAM can also help if the computer supports it and you regularly run out of memory.
But some machines cannot be upgraded.
And if the processor, graphics hardware or other core components cannot handle your workload, software tweaks can only take you so far.
Microsoft suggests considering a new PC when an older machine can no longer receive current updates, regularly produces errors, takes significantly longer to perform common tasks or consistently shows high CPU, memory or disk usage. (Microsoft Support)
That is the point where replacing the computer becomes a hardware decision rather than a cleaning exercise.
The fastest way to make an old computer feel better
You do not have to do everything in this guide at once.
Start with the things most likely to make a difference:
Free up storage. Remove large files, unused applications and temporary clutter.
Check what is running. Use Task Manager or Activity Monitor to find resource-heavy apps.
Reduce startup programs. Stop unnecessary software from launching every time you turn the computer on.
Update the system. Install available operating system and application updates.
Restart. Give the system a clean session and see whether the problem returns.
Check the hardware. Look at RAM, storage type, heat and overall system health.
Then test the computer again.
If it feels faster, you have probably found at least part of the problem.
If it does not, you have also learned something useful. The issue may be deeper than a cluttered desktop or a full Downloads folder.
You might not need a new computer after all
Computers tend to accumulate problems slowly.
A few startup apps become ten. A drive that once had hundreds of gigabytes free becomes almost full. A browser gains extensions and dozens of forgotten tabs. One demanding application becomes part of your everyday workflow.
Eventually, the computer feels old.
But age is only part of the story.
Before spending money on a replacement, find out what is actually limiting your machine. Clear what you no longer need, reduce unnecessary background activity, keep the system updated and pay attention to how the computer uses its CPU, memory and storage.
If those changes solve the problem, you have bought yourself more useful life without buying another computer.
And if they do not, you will at least know why you are upgrading.
