How Can I Speed Up My Computer? 10 Ways to Improve Performance

A slow computer can waste a surprising amount of time.

Applications take longer to open. Teams calls stutter. Outlook freezes. Browser tabs stop responding. Even simple jobs begin to feel harder than they should.

The good news is that a slow PC does not always need replacing.

Windows performance problems can be caused by overloaded startup apps, limited storage, old software, malware, failing hardware or simply a computer that no longer matches the workload being asked of it.

Microsoft’s own Windows guidance recommends checking updates, reducing startup applications, freeing storage and reviewing system performance before assuming the hardware needs replacing.

Here are 10 practical ways to speed up a Windows computer and improve performance.

1. Restart the Computer Properly

It sounds basic, but restarting can solve a surprising number of performance problems.

Many users leave their computers running for days or weeks, putting them to sleep rather than fully restarting.

Over time, applications and background processes may:

• consume increasing amounts of memory
• stop responding correctly
• leave temporary processes running
• fail to release resources
• wait for updates to complete

Restarting Windows closes running processes and reloads the operating system into a clean session.

This can often fix temporary slowness, especially if the PC has not been restarted for a long time.

The important point is that this is not because RAM has become “fragmented”. Restarting simply clears running processes and resets the system state.

2. Reduce Unnecessary Startup Apps

Many applications configure themselves to start automatically when Windows loads.

Some are useful.

Others are not.

If too many programs start at the same time, the computer can feel slow immediately after login.

Typical examples include:

• messaging applications
• cloud storage tools
• printer utilities
• software updaters
• manufacturer utilities
• meeting apps
• applications you rarely use

In Windows 11, you can review startup apps through:

Settings > Apps > Startup

You can also use Task Manager > Startup apps.

Do not disable security software, management tools or applications required by your IT provider unless you know exactly what they do.

The objective is to remove unnecessary startup load, not disable important business services.

Microsoft specifically recommends reviewing startup apps as part of improving Windows performance.

3. Keep Windows and Applications Updated

Updates do more than fix security vulnerabilities.

They can also resolve:

• bugs
• performance problems
• application crashes
• driver issues
• compatibility problems

Check Windows Update regularly and install supported updates.

Microsoft recommends checking both standard and optional updates when troubleshooting slow Windows performance.

Do not stop at Windows.

Applications such as:

• Microsoft 365
• Google Chrome
• Microsoft Edge
• Adobe Acrobat
• Teams
• Zoom
• accounting software
• specialist business applications

also need updating.

A PC running a fully patched copy of Windows can still perform badly if an old third-party application is causing problems.

4. Free Up Storage Space

A computer with very little free disk space can become noticeably slower.

Windows needs available storage for things such as:

• temporary files
• updates
• application caches
• paging
• installation processes

Microsoft specifically warns that low disk space can reduce performance and recommends using Storage Sense and Windows cleanup tools to remove unnecessary files.

You can check storage under:

Settings > System > Storage

Look for:

• temporary files
• old downloads
• unused applications
• large video files
• duplicate data
• old installation files

Windows Storage Sense can also automate some cleanup tasks.

Be careful when deleting files on business computers.

If you are unsure whether something is required, speak to your IT provider first.

5. Check What Is Using the Computer's Resources

Task Manager is one of the quickest ways to understand why a PC feels slow.

Press:

Ctrl + Shift + Esc

Then look at:

• CPU
• Memory
• Disk
• Network

If one application is constantly using most of the processor or memory, you may have identified the problem.

Common causes include:

• excessive browser tabs
• large Excel workbooks
• Teams
• background synchronisation
• antivirus scans
• Windows updates
• cloud backup software
• badly behaving applications

Do not automatically end every process you do not recognise.

Some are essential Windows or security processes.

Use Task Manager as a diagnostic tool rather than a button for randomly killing services.

6. Check for Malware

Malware can make a computer dramatically slower.

An infected PC may be:

• running hidden processes
• downloading files
• communicating with attackers
• stealing browser information
• encrypting files
• using the processor for malicious activity

Windows Security provides built-in malware protection, and many businesses also use centrally managed endpoint detection and response platforms.

Microsoft’s Windows Security tools include device protection features intended to help defend systems from malicious software.

If a computer suddenly becomes slow without an obvious reason, particularly if you also notice pop-ups, browser changes, unusual network activity or security warnings, the problem should be investigated rather than treated purely as a performance issue.

7. Upgrade From a Hard Drive to an SSD

If your computer still uses a traditional mechanical hard disk drive, replacing it with a solid-state drive can make an enormous difference.

SSDs have no moving mechanical parts and can access data far faster than traditional hard drives.

The difference can be particularly noticeable when:

• starting Windows
• opening applications
• loading files
• installing updates
• searching data

For older but otherwise capable computers, an SSD upgrade can sometimes extend useful life significantly.

That said, businesses should consider the age of the whole machine.

Installing an SSD into an eight-year-old computer with an unsupported processor and limited RAM may simply postpone an inevitable replacement.

8. Check Whether You Have Enough RAM

RAM is the short-term working memory used by Windows and applications.

If there is not enough available, Windows may have to move information between memory and storage more frequently, which can reduce responsiveness.

Modern business users often run several demanding applications simultaneously:

• Outlook
• Teams
• Excel
• multiple browser tabs
• CRM software
• accounting systems
• cloud storage
• security tools

A computer that was perfectly adequate several years ago may now struggle with a modern workload.

Task Manager can show how much memory is being used.

If RAM usage is regularly close to maximum during normal work, an upgrade may help if the computer supports it.

9. Clear Temporary Files and Remove Unused Software

A desktop full of icons is rarely the main reason a computer is slow.

The bigger issue is often unnecessary software and accumulated temporary data.

Over time, computers can collect:

• temporary files
• outdated installers
• unused applications
• old browser data
• manufacturer utilities
• abandoned software

Removing software that genuinely is no longer required can reduce background services, disk usage and update overhead.

Windows includes built-in storage cleanup tools, and Microsoft recommends removing unnecessary files when troubleshooting performance.

Do not uninstall applications from a managed business computer unless you know they are unnecessary.

Security, backup and remote-management tools may not always be obvious from their names.

10. Know When It Is Time to Replace the Computer

Eventually, software optimisation stops being the answer.

A computer may simply be too old.

Warning signs include:

• frequent freezing
• extremely slow startup
• failing storage
• insufficient RAM
• poor battery health
• repeated hardware faults
• unsupported processors
• inability to run Windows 11
• applications consistently running badly

This is particularly important in 2026.

Microsoft ended standard support for Windows 10 on 14 October 2025. Windows 10 PCs may continue to function, but Microsoft recommends moving to Windows 11 for continued mainstream security and support.

If an older PC cannot meet Windows 11 requirements, replacing it may make more sense than spending money trying to squeeze another year from ageing hardware. Microsoft provides PC Health Check and compatibility guidance to help determine whether a machine is suitable for Windows 11.

Don't Assume the Computer Is the Problem

This is an important point.

Sometimes the PC is fine.

The real problem might be:

• slow broadband
• weak Wi-Fi
• DNS problems
• cloud synchronisation
• a failing server
• a slow business application
• network congestion
• an overloaded VPN
• Microsoft 365 issues

Replacing the computer would not fix any of those.

Before spending money, try to determine whether the problem is:

the device, the network, the application or the service it is connecting to.

That is where proper diagnosis matters.

Why Business Computers Often Become Slow

Business PCs tend to accumulate software over time.

A typical employee may eventually have:

• Microsoft 365
• Teams
• OneDrive
• endpoint security
• remote-management software
• VPN software
• printer utilities
• accounting tools
• browser extensions
• specialist applications

Each one can add background processes and resource usage.

That does not mean these tools are unnecessary.

It means computer specifications need to match the real workload.

A machine purchased for basic email five years ago may no longer be suitable for Teams meetings, large spreadsheets, multiple cloud applications and modern security software.

Should I Upgrade or Replace My Computer?

A simple rule is to consider both cost and expected useful life.

An SSD or RAM upgrade can be worthwhile when:

• the computer is otherwise reliable
• the processor is still suitable
• Windows 11 is supported
• the upgrade is inexpensive
• you expect several more years of useful life

Replacement usually makes more sense when:

• multiple components are ageing
• the machine cannot support Windows 11
• performance problems keep returning
• battery or hardware failures are increasing
• staff productivity is being affected

The cheapest option today is not always the cheapest option over the next three years.

Slow Computers Cost More Than You Think

Suppose an employee loses just ten minutes every working day waiting for applications, restarts and frozen screens.

That becomes more than 40 hours of lost productivity over a typical working year.

Multiply that across several employees and old hardware can become surprisingly expensive.

This is why businesses should treat hardware replacement as lifecycle planning rather than waiting until computers become unusable.

How Hamilton Group Can Help

Hamilton Group can help businesses identify whether slow computers need optimisation, upgrading or replacing.

We can assist with:

• performance troubleshooting
• Windows 11 upgrades
• device replacement planning
• SSD and RAM assessments
• Microsoft 365 performance issues
• patch management
• malware investigation
• endpoint security
• network troubleshooting
• device lifecycle planning

The objective is not to replace every slow PC.

It is to identify the real cause and choose the most cost-effective fix.

If your team spends too much time waiting for slow computers, visit hgmssp.com or call 0330 043 0069 to speak with Hamilton Group.