To make a Windows 11 PC feel faster and cleaner, first find out what is slowing it down: low storage, too many startup apps, a resource-heavy process, outdated software, malware, or hardware that no longer meets your needs. Then use Windows’ built-in tools to address the cause. Cleanup and settings changes can help, but they cannot guarantee a speed increase—and older hardware may see little benefit.
Diagnose what is slowing down your PC
Use Task Manager before changing settings. Press Ctrl + Shift + Esc, then check Processes and Performance for unusually high CPU, memory, or disk use. Close programs you are not using. If one process remains unusually demanding, investigate what it is and whether you need it rather than disabling or uninstalling it at random.
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In Task Manager, open Startup apps to see which applications run when you sign in and the impact they have on startup. Slow startup and sluggish performance after sign-in can have different causes, so use the readings to guide the next step. Microsoft’s troubleshooting guidance also identifies low storage, outdated software, malware, and hardware limitations as possible causes: Tips to improve PC performance in Windows.
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Install updates and check for malware
Check Windows Update
Open Settings > Windows Update and check for updates. Windows updates can include fixes and performance improvements, but installing one does not guarantee a noticeable speed increase. Optional driver updates may be available; consider them only when relevant to your device or a specific issue.
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Run a Windows Security scan
For a malware check, open Windows Security > Virus & threat protection and run a scan. Malware is one possible cause of poor performance, so scanning is a useful diagnostic step—not a promise that every slowdown is caused by an infection.
Free storage with Windows’ built-in cleanup tools
Open Settings > System > Storage to review space use and find cleanup options. Check the categories and the space shown before removing anything; file names such as “temporary” or “unused” do not replace reviewing what Windows has selected.
Storage Sense: automate selected cleanup
Storage Sense can automatically remove temporary files and manage items in the Recycle Bin. It works on the system drive, usually C:. By default, it leaves the Downloads folder and cloud content alone unless you configure those categories. Review its settings before relying on it so you know what it will remove and when. See Microsoft’s Storage Sense guidance.
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Cleanup recommendations: review before removing
Cleanup recommendations can surface temporary files, large or unused files, cloud-synced files, and unused apps. Review each suggestion and its listed space before selecting it. This is a more deliberate choice than automatic cleanup when you want to decide which files or apps to keep.
Disk Cleanup and previous Windows files
Disk Cleanup is another built-in way to select file categories for removal, including system files. Be especially cautious with Previous Windows installation(s): deleting the Windows.old folder removes the option to return to the previous Windows version. Microsoft explains these cleanup choices in Free up drive space in Windows.
Choose a storage remedy that fits your files
If personal videos, music, photos, or documents are taking up space, decide whether to delete files you no longer need or move files you want to keep. An external storage device can hold files moved off the PC, and Microsoft also documents using external storage to help complete an update when Windows needs more room. That addresses a capacity constraint; an external drive is not, by itself, a speed upgrade.
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| Option | Best suited to | What to consider |
|---|---|---|
| Delete unneeded files | Files you do not want to keep | Review what you are deleting; some Windows cleanup choices affect recovery options. |
| Move files to external storage | Large personal files you want to retain but do not need on the PC | Useful when you need more room; the files are no longer readily available on the PC unless you reconnect the drive. |
| Use external storage for an update | A Windows update that needs more space | A capacity workaround, not a guaranteed performance improvement. |
Reduce startup load without disabling useful apps
Manage startup behavior through Settings > Apps > Startup or Task Manager’s Startup apps view. Use the impact information to prioritize apps that meaningfully affect startup, and turn off only applications you do not need to launch automatically. Before disabling one, check whether it supports a peripheral, security feature, file sync, or work routine you rely on.
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Remove apps you recognize and do not need
Open Settings > Apps > Installed apps and uninstall applications you recognize and no longer use. Removing an unused app can free storage and may reduce background activity. Do not remove unfamiliar software just because it appears in the list; first identify whether Windows, a device, or another program depends on it.
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Balance visual effects and power against responsiveness
Windows includes optional performance adjustments such as limiting background permissions where available, choosing a best-performance visual-effects preset, or setting Power mode to Best performance. These settings involve trade-offs. Best performance can use more power, drain a laptop battery faster, and make the device run warmer.
Try low-effort checks
Close unused apps and browser tabs, reduce unnecessary notifications, and restart the PC if it has been running for a long time. These steps are easy to try, but their effect depends on what is causing the slowdown.
Optimize drives the way Windows intends
Search Windows for Defragment and Optimize Drives to check drive status or run the built-in optimization operation. Windows generally optimizes drives automatically once a week. The operation differs by drive type: it defragments hard disk drives (HDDs) and trims solid-state drives (SSDs). Do not manually defragment an SSD or use third-party defragmenters as a general tune-up. See Microsoft’s drive optimization guidance.
Quick Recap
Match the fix to the symptom
- Storage is nearly full: review Storage Sense, Cleanup recommendations, and Disk Cleanup, then decide whether to delete or move large personal files.
- The PC is slow to start: inspect Startup apps and disable only unneeded automatic launches.
- Performance drops while using the PC: check Task Manager for high CPU, memory, or disk use and investigate persistent processes.
- There is no clear software or storage cause: check for updates and malware; consider whether the PC’s hardware is adequate for what you ask it to do.
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