Windows 11 Lagging After an Update? Here’s How to Fix It

Windows updates are designed to improve security, fix bugs, and introduce new features. However, they can occasionally have the opposite effect. After installing an update, you may notice that Windows 11 feels unusually slow, apps take longer to open, the desktop freezes, or the system crashes unexpectedly.

I’ve seen this happen for several reasons. Sometimes the update itself has a bug. In other cases, Windows is busy completing background tasks, a driver becomes incompatible, system files get corrupted, or an application starts conflicting with the newly updated operating system.

The good news is that you don’t necessarily need to reset or reinstall Windows. There are several troubleshooting steps you can try first.

Here’s how to fix Windows 11 lagging, freezing, or crashing after an update.

Why Is Windows 11 Lagging After an Update?

Before changing anything, it helps to understand what might be happening.

Windows 11 can become slow after an update because of:

• A problematic Windows update
• Outdated or incompatible drivers
• Corrupted Windows system files
• High CPU, RAM, or disk usage
• Too many startup applications
• Windows Update running background processes
• Compatibility problems with third-party software
• Corrupted temporary files
• Insufficient free storage
• Graphics driver problems

If the problem appeared immediately after a Windows update, the update is worth investigating first. However, don’t assume every performance issue is caused by Microsoft. An update can also expose an existing driver or software problem.

1. Give Windows Some Time After the Update

This sounds obvious, but it’s worth trying before making major changes.

After a significant Windows update, the operating system may perform background tasks such as indexing files, optimizing applications, updating components, and completing installation processes.

During this period, your computer may temporarily use more CPU, RAM, or disk resources.

If you installed the update only recently, restart your PC and let Windows sit idle for a while.

Try this:

1. Save your work and close your applications.
2. Click Start.
3. Select Power.
4. Choose Restart.
5. After restarting, avoid immediately opening multiple applications.
6. Leave the computer connected to power for some time if possible.

If the lag disappears after a few hours or after another restart, Windows was probably completing background tasks.

If the problem continues, move on to the next steps.

2. Check What Is Consuming System Resources

One of the easiest ways to find the cause of Windows 11 lag is to check Task Manager.

Press Ctrl + Shift + Esc to open Task Manager.

Under the Processes tab, look at:

• CPU
• Memory
• Disk
• GPU

If one application is consuming an unusually large amount of resources, it could be responsible for the slowdown.

For example, if Disk usage remains close to 100 percent, Windows or another application may be performing intensive disk operations.

You can click the CPU, Memory, or Disk column to sort processes by usage.

If you identify an application you recognize and don’t need at the moment, close it normally. Avoid ending unfamiliar Windows processes simply because they appear near the top of the list.

Also check the Performance tab to see whether CPU, memory, disk, or GPU usage remains unusually high.

3. Disable Unnecessary Startup Apps

An update can sometimes change application behavior or cause previously installed programs to start automatically.

Too many startup applications can make Windows take longer to boot and may contribute to sluggish performance.

Open Task Manager and select Startup apps.

You’ll see applications that automatically launch when Windows starts.

Look through the list and identify programs you don’t need immediately after signing in.

Right-click an unnecessary application and select Disable.

Don’t disable security software or Windows components unless you know exactly what they do.

After making your changes, restart the computer and see whether performance improves.

4. Update Your Drivers

Driver compatibility is one of the first things I would check when Windows begins crashing or freezing after an update.

Windows updates can sometimes interact poorly with older graphics, chipset, network, audio, or storage drivers.

Start with your graphics driver if the symptoms include:

• Screen freezing
• Display glitches
• Games crashing
• Video playback problems
• Black screens
• Desktop flickering

To check drivers:

1. Right-click the Start button.
2. Select Device Manager.
3. Expand categories such as Display adapters, Network adapters, Sound, video and game controllers, and System devices.
4. Right-click the relevant device.
5. Select Update driver.

For graphics drivers, I also recommend checking the support website of your computer or graphics hardware manufacturer for the latest Windows 11-compatible driver.

If the problem began immediately after a driver update, Device Manager may also offer a Roll Back Driver option.

5. Run the Windows Update Troubleshooter

Windows 11 includes troubleshooting tools that can identify certain update-related problems.

Open:

Settings > System > Troubleshoot > Other troubleshooters

Look for Windows Update and select Run.

Follow the instructions displayed on screen.

The troubleshooter may detect problems related to Windows Update components or configuration.

Once it finishes, restart your computer and check whether the lag or crashes continue.

6. Repair Corrupted Windows System Files

Sometimes an update doesn’t complete correctly, leaving damaged or corrupted system files behind.

Windows includes two useful command-line tools for repairing system components: System File Checker (SFC) and Deployment Image Servicing and Management (DISM).

First, open Windows Terminal as administrator.

You can do this by right-clicking Start and selecting Terminal (Admin).

Run:

DISM /Online /Cleanup-Image /RestoreHealth

Wait for the process to finish. It may take some time.

Then run:

sfc /scannow

SFC will scan protected system files and attempt to repair corrupted ones.

When both commands finish, restart your computer.

If corrupted system files were contributing to the problem, you may notice an improvement after restarting.

7. Free Up Storage Space

A nearly full system drive can also make Windows feel sluggish.

Open:

Settings > System > Storage

Check how much free space is available on your Windows drive.

You can use Temporary files to remove files Windows no longer needs.

Windows also provides Storage Sense, which can automatically clean certain temporary files.

If your drive is almost full, consider removing applications you no longer use, moving large personal files to another drive, or transferring media to external storage.

Try to keep a reasonable amount of free space available rather than allowing the system drive to remain completely full.

8. Uninstall a Recent Windows Update

If your computer was working normally before the update and became unstable immediately afterward, uninstalling the most recent update can help determine whether the update is responsible.

Go to:

Settings > Windows Update > Update history

Scroll down and select Uninstall updates.

You’ll see recently installed updates.

If the issue started directly after a particular update, you may be able to uninstall it.

However, don’t remove security updates casually. If you uninstall an update to troubleshoot a serious problem, keep checking for a newer Microsoft update that resolves the issue.

If the problematic update is known to have been replaced by a newer release, installing the newer update may be preferable to remaining on an older configuration.

9. Use System Restore

If System Restore was enabled before the problem appeared, you may be able to return Windows to an earlier restore point.

Search Windows for Create a restore point and open it.

Select System Restore and follow the wizard.

Choose a restore point created before the update or before the performance problems began.

System Restore doesn’t normally remove your personal documents, but it can reverse system files, drivers, installed applications, and configuration changes.

Before proceeding, review the restore point information carefully.

10. Perform a Clean Boot

If Windows still lags or crashes, a third-party application or service may be conflicting with Windows.

A clean boot starts Windows with a minimal set of drivers and startup programs.

Press Windows + R, type:

msconfig

and press Enter.

Open the Services tab.

Select Hide all Microsoft services first. Then you can disable non-Microsoft services for troubleshooting.

Next, open Task Manager from the Startup section and disable unnecessary startup applications.

Restart your PC.

If Windows suddenly performs normally, a third-party application or service is likely contributing to the problem.

You can then re-enable items gradually to identify the culprit.

11. Check Windows in Safe Mode

Safe Mode is another useful way to determine whether third-party software or drivers are causing the problem.

Go to:

Settings > System > Recovery

Under Advanced startup, select Restart now.

After the restart, choose:

Troubleshoot > Advanced options > Startup Settings > Restart

Then select the Safe Mode option.

Use the computer for a while in Safe Mode.

If Windows is significantly more stable there, the problem may be related to a driver, startup application, or third-party service rather than the basic Windows installation.

12. Reset Windows 11 as a Last Resort

If you’ve tried everything and Windows continues to freeze, crash, or lag badly, resetting Windows may be worth considering.

Go to:

Settings > System > Recovery > Reset this PC

Windows provides options that can allow you to keep your personal files while removing applications and resetting system settings.

Before choosing this option, make a complete backup of important files.

A reset can resolve persistent software problems, but it should generally be one of the final troubleshooting steps rather than the first thing you try.

What If Windows 11 Still Keeps Crashing?

If Windows continues crashing even after repairing system files, updating drivers, removing problematic updates, and performing a reset, the issue may not be Windows itself.

Hardware can also cause freezing and crashes.

Pay attention to symptoms such as:

• Random blue screens
• Frequent hard-drive errors
• Memory-related errors
• Overheating
• Unexpected shutdowns
• Strange noises from mechanical drives
• Graphics corruption
• Crashes during demanding applications

In these situations, checking your RAM, storage drive, temperatures, and other hardware components may be necessary.

If the computer is still under warranty, contacting the manufacturer’s support team can be a better option than replacing hardware yourself.

Final Thoughts

Windows 11 lagging after an update can be frustrating, particularly when everything was working normally before the installation. Fortunately, the problem doesn’t automatically mean that you need to reinstall Windows.

Start with the simple solutions: restart the computer, check Task Manager, disable unnecessary startup applications, and make sure your drivers are current. If the problem continues, use Windows’ built-in troubleshooting and repair tools such as the Windows Update troubleshooter, DISM, and System File Checker.

If the problem clearly started after a specific update, reviewing update history and considering System Restore or uninstalling the problematic update may help.

And if Windows remains unstable after all software troubleshooting, don’t overlook the hardware. A failing SSD, defective RAM, overheating, or graphics problem can produce symptoms that look very similar to an operating system issue.

The key is to troubleshoot one change at a time. That makes it much easier to identify what actually fixed the problem instead of changing several settings and hoping for the best.

Disclaimer

The troubleshooting methods described in this article are intended for general informational purposes. Windows settings, update behavior, and available recovery options can vary depending on your Windows 11 version, hardware, and installed software. Always back up important files before uninstalling updates, modifying system settings, using System Restore, or resetting Windows. If you’re unsure about a system-level change, consider consulting Microsoft Support or a qualified technician.