Upgrading from Windows 10 to Windows 11 is supposed to make your computer or laptop faster, smoother, and more secure. But for many users, the experience is just the opposite. Users may experience delayed startup times and reduced responsiveness, application lag, and increased system resource usage after upgrading from Windows 10 to Windows 11. If you’re also one of those who are frustrated by a slow Windows 11 system, there’s no need to panic. Read this detailed blog, where we’ve highlighted the five effective steps to help troubleshoot and optimize a Windows 11 PC that has become slow after an upgrade.
Introduction
According to 2026 data from StatCounter Global Stats, Windows 11 has become the dominant desktop operating system worldwide, accounting for approximately 71.84% of Windows users worldwide, while Windows 10 holds a market share of about 26.21%. The reason behind this is simple: “Windows 11 has a modern interface, enhanced security features, improved performance optimizations, and ongoing support from Microsoft, in comparison to Windows 10.” As Microsoft continues to make innovative developments on Windows 11, older versions are becoming less useful and relevant. That’s a reason why many users are making the transition to upgrading from Windows 10 to Windows 11, because they also want to leverage the benefits of newer updates. But the problem is, even after upgrading to Windows 11, many users are experiencing performance issues on their desktops. Some of the common causes behind this may include:
- Outdated drivers that might be struggling to work properly with Windows 11.
- Your PC may still be indexing files, installing updates, or optimizing settings after the upgrade.
- Your PC may have low storage space.
- The presence of too many startup apps on your PC.
- Your PC is old.
- Certain apps on your PC that are designed for Windows 10 may not run efficiently on Windows 11.
- Missing or damaged files during the upgrade process can affect system speed.
- Features such as animation, transparency effects, and widgets can consume extra system resources, especially on older laptops.
5 Steps to Fix Performance Issues After Upgrading from Windows 10 to Windows 11
If your PC feels slower after moving to Windows 11, these five solutions often help restore performance.
1. Update Windows and Device Drivers
One of the most common causes of performance problems is outdated or incompatible drivers. During an upgrade, Windows may install generic drivers that do not fully support your hardware.
Start by checking for Windows updates:
Settings → Windows Update → Check for Updates
Install all available updates, including optional updates. These often contain important driver fixes for graphics cards, storage controllers, network adapters, and chipsets.
For the best results, visit your PC manufacturer’s website and download the latest drivers directly. Brands such as Dell, HP, Lenovo, ASUS, and Acer regularly release Windows 11-optimized drivers that improve stability and speed.
A graphics driver update alone sometimes fixes lag, screen stuttering, and poor gaming performance.
2. Remove Upgrade Leftovers and Disable Unnecessary Background Services
An in-place upgrade keeps most of your old files, settings, and applications. While convenient, it also leaves behind outdated services, temporary files, and startup programs that continue running in the background.
Press Ctrl + Shift + Esc to open Task Manager.
Select the Startup Apps tab and disable applications you do not need launching with Windows. Many systems load multiple utility programs that consume memory before you even open an application.
Next, check the Processes tab. Look for programs using unusually high CPU, RAM, or disk resources.
If system files became corrupted during the upgrade process, run a System File Checker scan:
- Open Command Prompt as Administrator
- Type:
sfc /scannow
- Press Enter
Windows will scan and repair damaged system files that might be affecting performance.
3. Adjust Visual Effects for Better Speed
Windows 11 includes more animations, transparency effects, and visual enhancements than Windows 10. These features look attractive, but older hardware often struggles to handle them efficiently.
To reduce the load:
- Search for Adjust the appearance and performance of Windows
- Open the Performance Options window
- Select Adjust for best performance
You can also manually disable specific effects while keeping others enabled.
Focus on turning off:
- Transparency effects
- Window animations
- Fade effects
- Shadow effects
Many users notice faster menu navigation and improved responsiveness immediately after reducing visual effects.
4. Free Up Disk Space Using Storage Sense
Low storage space impacts system performance more than many people realize. When your drive becomes crowded, Windows has less room for temporary files, updates, and virtual memory operations.
Open:
Settings → System → Storage
Then enable Storage Sense and select Run Storage Sense now.
This tool removes unnecessary files such as:
- Temporary files
- Windows update leftovers
- Recycle Bin contents
- Cached system data
You should also review the Temporary Files section and remove items you no longer need.
For deeper cleanup, run Disk Cleanup and delete old Windows installation files if you are certain you will not return to Windows 10.
5. Switch to High Performance Power Mode
Many upgraded systems remain on balanced power settings, which limit CPU performance to save energy.
To maximize speed:
Settings → System → Power & Battery → Power Mode → Best Performance
You can also open:
Control Panel → Power Options → High Performance
This allows your processor and hardware components to operate at higher performance levels when needed.
While you’re there, optimize your storage drive:
- Search for Defragment and Optimize Drives
- Select your drive
- Click Optimize
Traditional hard drives benefit significantly from optimization. SSDs also gain from Windows maintenance operations performed through this tool.
Conclusion
Upgrading from Windows 10 to Windows 11 should improve your computing experience, but performance issues sometimes appear after the transition. In many cases, slow startup times, lagging applications, high resource usage, and reduced responsiveness are caused by outdated drivers, unnecessary background processes, low storage space, or settings that are not optimized for your hardware. By following the five solutions discussed above, you can often restore your system’s speed and enjoy the benefits that Windows 11 offers.
If your Windows 11 running slow issue continues even after trying these fixes, there may be a deeper hardware or software problem affecting your computer. In that case, professional assistance is the best option. Mobile Computer Repair provides reliable and affordable computer repair services throughout Los Angeles. Our experienced technicians can diagnose performance issues, repair software problems, upgrade hardware, remove system errors, and help your PC run smoothly again. Contact Mobile Computer Repair today for fast, professional support and get your computer back to peak performance.