Does PC Cleaning Improve Performance?

Is your personal computer (PC) feeling a bit sluggish? Giving it a good, old-fashioned cleaning can improve its performance, and it only takes minutes. If you’ve never cleaned your PC before, you have a few options to speed up the process.

In this guide, we explain why computers slow down over time, set expectations for what a cleaning routine can and can’t do, and share step-by-step instructions to help you clean your PC and restore optimal performance. 

PCs perform more slowly over time

For the most part, PCs don’t slow down on their own. It’s rarely one single problem. It’s how we accumulate apps, files, and services that slow your PC down as it ages. A few examples come to mind:

• You create files: These personal files that you create take up increasing amounts of disk space. When your drive gets crowded, Windows has less room to perform its background tasks, so everything feels slower.
• Temporary files add up: These are created constantly for updates, browsing, and app activity, and they don’t always clean up after themselves.
• You collect unused apps: Old apps consume storage, and some keep running services even when you never open them.
• Windows adds services: When Windows updates, it further accumulates background services and other processes that reduce performance.
• Startup programs multiply: Many apps sneak into your startup list, which makes your computer boot slower and run “busy” right from the start.
• Dust builds up inside the machine: Dust traps heat, and when your PC gets too warm, it automatically slows down to protect itself.

What PC cleaning can and can’t do for performance

Cleaning is definitely worth doing, but you should set realistic expectations for how much your PC’s performance can improve. Similar to decluttering your home, you are not rebuilding your house, but it will feel much easier to live in.

What PC cleaning can accomplish

PC cleaning addresses software-level performance bottlenecks. When you remove temporary files, clear browser caches, and delete unused applications, you’re freeing up valuable disk space and reducing the workload on your system. This directly impacts how quickly your computer can access and process information.

Startup optimization also delivers some of the most noticeable improvements. If your computer takes several minutes to boot because too many programs are launching automatically, trimming your startup list can cut boot times significantly. You’ll also notice improved responsiveness during everyday tasks when fewer background processes compete for system resources.

You will also notice faster web browsing when you clear accumulated browser data, quicker file searches when your system isn’t indexing thousands of temporary files, and smoother multitasking when background services aren’t consuming unnecessary memory. With proper system maintenance, you can restore 15-30% of lost performance on aging computers.

What PC cleaning cannot fix

Hardware limitations represent the biggest constraint on what cleaning can accomplish. If your processor struggles with modern software demands or your RAM is maxed out during normal use, no amount of cleaning will change these hardware realities. Cleaning your PC to make it faster depends largely on whether software bloat or hardware constraints are your primary bottleneck.

Gaming performance, video editing, and other intensive tasks rely heavily on central processing unit (CPU) and graphics processing unit (GPU) capabilities. While a clean system ensures these components aren’t fighting unnecessary background processes, cleaning won’t magically boost frame rates or rendering speeds beyond your hardware’s capabilities.

But first, back up your files

Any cleanup is safer when you know your important stuff is protected. You don’t have to do a complicated backup routine; just make sure the essentials are safe.

• Check your cloud backups: If you use OneDrive, Google Drive, or iCloud, you may already be backed up without realizing it. Give those files a quick review. It only takes two minutes to confirm that your data is backed up in the cloud.
• Consider an external backup: An external drive gives you a second copy of your files in case something goes wrong. It’s especially helpful for photos, work documents, or anything you’d hate to lose.

In newer versions of Windows, go to Settings > Update & Security > Backup to set up File History, or use Settings > Accounts > Sync your settings for cloud backup. This ensures you won’t lose important files.

Step by step: Clean up your computer

Now that you’ve ensured your important files are safe, you can start the cleanup process that makes a noticeable difference in PC performance. You don’t need advanced technical skills, and you don’t need to do everything at once.

Remove temporary files and unused apps

Go to Settings > System > Storage > Temporary files and review the categories. This will take you to a screen that gives you insight into what your drive space looks like and allow you to safely remove many of them with a few clicks, especially cache and old system leftovers. 

In Windows 10/11, go to Settings > Apps > Apps & features, then sort apps by size or installation date to identify large or forgotten programs. Click any app and select “Uninstall” to remove it. 

You can also use the built-in Disk Cleanup tool by typing “Disk Cleanup” in the Start menu search. Select categories such as “Temporary files,” “Recycle Bin,” and “System cache” to review the files and remove any that are not needed. If you’re unsure what a program does, research it online before removing it, as some applications may be essential for your system’s operation. For example, you might want to keep “Windows update log files,” in case you ever need to troubleshoot Windows.

Set Windows Storage Sense for automatic cleanup

Instead of performing a manual cleanup, you can use Windows Storage Sense to keep your system clean. Navigate to Settings > System > Storage > Storage Sense to configure this powerful feature. You can set it to automatically remove temporary files, empty your recycle bin, and clear your Downloads folder of files older than 30 days.

Removing old and unused apps benefits you in two ways. First, it frees up disk space. Second, outdated apps can contain security loopholes that hackers may exploit. Older apps might have gone without an update, which can lead to security loopholes that hackers can exploit. Remove the old app, and you remove the loophole.

Use Disk Cleanup

Disk Cleanup is an older Windows tool, but it’s still reliable. It can clear system files and cached data safely when used carefully. In Disk Cleanup, you can confidently delete Temporary files, Recycle Bin contents, System error memory dump files, and old Windows Update cleanup files. Temporary Internet Files and Downloaded Program Files are also safe to remove, as your browser will recreate what it needs.

To access this tool, search “Disk Cleanup” in the Start menu, and choose your main drive (usually C:) when prompted. Review the temporary file categories before removing them. Just read descriptions, and avoid deleting anything you might need for troubleshooting.

Manage large files effectively

Identify space-consuming files by looking for large video files, old software installers, or duplicate files that you no longer need. Move important large files to external storage or cloud services to free up local space while keeping them accessible.

Clear your browser cache and cookies

This one is a bit of a double-edged sword. Your cache and cookies make many web pages load faster. By storing images, preferences, and other info, cookies speed up load times. However, the data that cookies store can get bloated over time. If the disk space they use looks a little high to you, clean them out. You can do this in Windows by typing “Cookies” in your search bar or selecting “Delete browsing data” from your browser’s menu.

Note that this may remove any saved passwords stored in your browser. However, if you’re using a password manager, this isn’t a worry. The manager does the remembering for you.

Shut off startup apps

Windows runs several apps at startup, some of which you certainly need, such as antivirus software or online protection software. Other apps, however, might not be needed to run right away and just slow down startup.

To review your startup apps, type “Startup” in the Windows search bar or press Ctrl + Shift + Esc to open Task Manager. Click the Startup tab to see a list of apps and their impact on performance. Disable programs you don’t need immediately, but keep essential security software enabled. Focus on applications marked with “High” startup impact. 

Keep essential security software enabled at startup, and research unfamiliar programs before disabling them or just leave them alone.

Erase sensitive files from the recycle bin

You’d think that deleting files in the recycle bin erases them entirely. Not so. It only removes the “pointer” to those files, but the data remains on the drive. The only way to completely remove files is when something new overwrites them, which can take time.

To completely erase files with sensitive info, use a file shredder tool similar to that in McAfee+. Although this doesn’t necessarily improve performance, it helps prevent identity theft.

Update your operating system and drivers

Ensure optimal performance and security with the latest updates. Go to Settings > Update & Security > Windows Update and click “Check for updates.” For driver updates, visit Settings > Update & Security > Windows Update > View optional updates, or use Device Manager by right-clicking the Start button and selecting it. Updated drivers improve hardware compatibility and can resolve performance issues.

Run a comprehensive security scan

If your PC feels abnormally slow, malware may be the real cause. Complete your cleanup by scanning for malware and other threats that may be causing the slowdown. Some threats run quietly in the background, consuming system resources and compromising privacy.

• Use built-in Windows Security or trusted tools: Start with a quick scan, and follow up with a deeper scan if anything looks suspicious. This can remove hidden processes that slow down your system.
• Avoid random “free cleaners”: Many of them bundle adware or unwanted programs. Stick to well-known security vendors and official sources.

Deep clean with a PC Optimizer

For a deeper clean, consider PC cleaning software such as McAfee PC Optimizer, designed to detect and clear out unnecessary files, manage startup apps, and even clean the registry at the press of a button. These cleaners usually come with customizable settings to suit your preferences. You can set automatic clean-ups at regular intervals, thus saving time, and freeing you from the hassle of remembering to run the cleanup.

To choose reliable and safe PC cleaning software, read reviews and understand what each feature does. Always use a trusted, reputable security software and avoid downloading PC cleaners from unknown sources, as some may contain malware.

Special considerations for SSD drives

If your PC uses a solid-state drive (SSD), avoid traditional defragmentation as it can reduce the drive’s lifespan without providing performance benefits. Windows automatically runs TRIM commands to instruct your SSD to delete data blocks that are no longer used. 

You can manually enable TRIM by opening Command Prompt as an administrator and running “fsutil behavior set DisableDeleteNotify 0” to confirm it’s enabled. However, we do not recommend doing this. It’s best to let Windows handle optimization automatically. 

Windows registry: To clean or not to clean

The Windows registry is your computer’s central database, storing critical configuration settings for your operating system and installed programs. Registry cleaning is a misunderstood part of PC optimization. Many people think it’s essential, but modern Windows systems usually don’t benefit from it. In addition, today’s Windows versions manage registry complexity more effectively than older versions. 

Unlike clearing temporary files or uninstalling old apps, manual registry changes can have far-reaching consequences and serious issues if done incorrectly. A single incorrect change can prevent apps from opening or cause system instability. Unless you’re troubleshooting a specific issue, it’s safer to skip it.

A clean slate for you and your PC

Restart your computer after completing these steps to ensure all changes take effect properly. Regular maintenance every 3-6 months will help keep your PC running smoothly and securely.

Physically clean your computer

Another aspect of cleaning your PC to improve its performance entails physical cleanup, specifically dust removal. When dust builds up, your PC can’t cool itself properly, leading to slower speeds, louder fans, and random stuttering. Follow this quick guide:

• Power down and disconnect everything: Turn off your computer entirely and unplug all cables before cleaning. This prevents electrical damage and keeps you safe during the cleaning process.
• Discharge static electricity: Touch a grounded metal object or use an anti-static wrist strap before handling internal components. Static electricity can damage sensitive computer parts.
• Use compressed air for dust removal: Blow out dust from vents, fans, and internal components using short bursts of compressed air. Hold the can upright and maintain a few inches of distance to avoid moisture buildup.
• Support fan blades while cleaning: Gently hold fan blades in place when using compressed air to prevent them from spinning too fast, which can damage the motor or create electrical feedback.
• Clean case vents and intake areas: Remove dust from all ventilation openings, especially intake fans and exhaust vents, which tend to accumulate dust.
• Avoid liquids near electronics: Never use water, cleaning solutions, or damp cloths on internal components. If you must clean the exterior case, use slightly damp cloths only on plastic surfaces, avoiding all ports and openings.
• Focus on heat-generating components: Pay special attention to the CPU cooler, graphics card fans, and power supply vents, as dust here directly impacts cooling performance.
• Clean regularly for sustained performance: Dust-free systems run cooler and prevent thermal throttling, where your CPU or GPU reduces performance to avoid overheating. This keeps your computer running at optimal speed.
• Know when to seek professional help: If you’re uncomfortable opening your computer case or notice excessive dust buildup in hard-to-reach areas, consider having a professional service perform a thorough cleaning.
• Reassemble and test: Once you have completed the cleaning, reconnect all cables and secure the side panel. Power on your system and check that the CPU fan spins properly. Monitor temperatures during initial use to ensure adequate cooling.

Clean your PC to improve your game, somewhat

If you’re asking this question, you’re probably gaming — and yes, cleaning can help restore lost frames per second (FPS), but it won’t magically exceed your hardware’s capabilities. 

Dust buildup causes thermal throttling, which leads to frame drops and stuttering. Physical cleaning will reduce overheating, improve airflow, and help maintain stable frame rates.

Meanwhile, too many processes can consume CPU time and RAM, hindering your gaming experience. Trimming startup apps and closing unused background tools can improve gaming smoothness.

Remember, though, that cleaning won’t address your PC’s hardware limitations. If your GPU can’t handle your settings, no amount of cleanup will make it a high-end card. Cleaning keeps your current hardware running at its best.

Find the best PC cleaner

For most users, combining manual cleaning with reputable automated tools provides the best results. Quality PC optimizers can safely handle routine maintenance tasks, but it’s also important to choose trusted solutions that won’t cause more problems than they solve.

Make safe choices

The market offers both legitimate optimization software as well as potentially harmful programs that could compromise your system’s security and privacy. Red flags to watch for include solutions that:

• Bundle adware or unwanted programs that install alongside the cleaner
• Promise unrealistic performance gains through aggressive registry modifications
• Exaggerate scan results, claiming thousands of “critical errors” to pressure you into purchasing
• Request excessive system permissions beyond what’s needed for basic cleanup tasks
• Lack of transparency about what files or settings will be modified

Choose trustworthy PC cleaning tools by:

• Downloading only from official vendors and verified software repositories
• Reading user reviews and expert evaluations from reputable technology publications
• Verifying the software publisher’s reputation and track record in cybersecurity
• Checking for clear privacy policies that explain data collection practices
• Looking for tools that provide detailed cleanup reports before making changes
• Considering integrated solutions that include PC optimization and protection capabilities for better compatibility and coordinated system management

Consider hardware upgrades

If you have done everything you can to clean your PC systemically and physically, and it is still running slow, it might be time to consider a hardware upgrade. Modern computers with sufficient RAM and processing power respond well to maintenance, while older systems may need hardware upgrades to see meaningful improvements. In this day and age, upgrading to 8GB or 16GB will likely deliver more dramatic performance improvements than any cleaning routine. 

Similarly, switching from a traditional hard drive to an SSD provides speed boosts that far exceed what software optimization can do. For example, upgrading to an SSD can dramatically reduce boot times, while routine PC cleaning typically produces more modest improvements. The sweet spot for PC cleaning benefits occurs when you can balance adequate hardware and software accumulation. 

Final thoughts

Cleaning your PC is an essential part of maintaining its performance. While it might not drastically increase your PC’s speed, it contributes to overall efficiency, responsiveness, and longevity.

The key to lasting results is establishing a consistent maintenance routine, whether it means weekly disk cleanups, monthly startup reviews, or quarterly deep cleans with trusted tools. Take note that it is best to approach PC cleaning carefully, deleting with discretion to avoid accidentally removing necessary files or applications. For those who aren’t comfortable doing it manually, reliable PC cleaning software like McAfee+ can simplify the process and save time.

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