Since Windows 11 24H2 update everything runs slow and takes longer to load

Hello, Alien Tribe

Welcome to the Microsoft Community.

Hello, Thank you for your feedback here on your issue, it looks like the system is running slow and taking longer to load after the Windows 11 24H2 update.

First of all, thank you for sharing this information, I have done some searching and researching for you and indeed some users have reported slowdowns after the update, this may be due to the fact that there are some O365 apps that need to be re-installed which may cause lagging, however, we can't rule out the possibility of an anomaly at the time of the update causing an anomaly in the system, I will provide you with a few suggestions on how to check this for you:

1. Windows update issues or background processes

After a major Windows update like 24H2, some background processes may take longer to complete. These may include:

Windows updates stuck in the background: Sometimes updates may still be running in the background, such as indexing files or app updates, and this can take some time. You can check for unfinished installations or background tasks in Settings > Update and Security > Windows Update.

Search indexing: After the update, the search indexing service may also be the cause of delays. You can try to rebuild the index by going to Control Panel > Indexing Options > Advanced > Rebuild.

2. Driver Issues

After the update, some drivers may not work properly or may be outdated, especially for graphics cards, storage devices or chipsets, which may affect performance.

Update drivers: Make sure all drivers are up to date, especially GPU, chipset and storage (SSD) controllers. You can check for updates through Device Manager or visit the manufacturer's website for the latest drivers.

3. Antivirus and security software conflicts

You mentioned that Microsoft automatically enables Defender and disables Malwarebytes, which may cause conflicts or take up additional system resources.

Disable Microsoft Defender: If you wish to keep Malwarebytes, you can temporarily turn off Defender. Go to Settings > Privacy & Security > Windows Security > Virus & Threat Protection Settings and turn off Real-Time Protection. You may need to manually re-enable Defender once the debugging is complete.

Running two security programs (Defender and Malwarebytes) at the same time may cause your system to slow down.

4. System file corruption

Corrupted system files can cause various performance issues, especially after a major update. You can use SFC (System File Checker) and DISM (Deployment Image Service and Management Tool) to scan and repair these files:

Open a command prompt (administrator) and run:

sfc /scannow

When finished, run the DISM utility:

dism /online /cleanup-image /restorehealth

This will check if any system files are corrupted and attempt to repair them.

5. Storage optimization

Even if you have a fast SSD, Windows 11 may have problems with file storage and fragmentation in some cases, especially after large updates. You can try optimizing the drive:

Defragment and Optimize Drive: Go to Settings > System > Storage > Optimize Drive and manually run the optimization task.

Also check the fast startup feature, if it's on turn it off for testing, if it's off turn it on for testing:

Press Win + R, type control and press Enter.

In the Control Panel, find and click on Power Options.

In the left-hand menu, click Select Power Button Functions

Click Change currently unavailable settings at the top of the page

Scroll down and in the Shutdown settings section, find Enable fast startup

Uncheck the Enable fast startup option.

Click Save Changes.

Restart the computer.

You may also want to consider rolling back updates. Go to Settings > Update and Security > Recovery > Rollback to previous version. If this option is still available, it can help restore your system to a previous state. Alternatively, you can refer to the thread below to uninstall the update:

How to Roll Back an Update via Windows Recovery Environment (WinRE) - Microsoft Community

Disclaimer: Running Microsoft Safety Scanner can help you check if the system is disturbed or malicious software exists. To avoid any trouble for you, please back up all your personal files first to ensure you do not lose data.  

Disclaimer: Temporarily turn off real-time Microsoft Defender antivirus protection in Windows Security. However, keep in mind that if you do so, your device may be vulnerable to threats. So please turn it on immediately once issue fixed. 

Best regards

Bobhe | Microsoft Community Support Specialist

I had the same problem after the update was installed yesterday. Everything is so slow, VPN was blocked.
In the end i decided to uninstall the update, which took 5 minutes.

Re-started my machine and it is back performing fine.

The update and install,takes forever. Why in the world,in this day and age,does install and update,take so long?! ****!

As for turning off and turning on stuff,it's the same with mobile companies. Verizon constantly adds games to my phone,without permission. And they try and preach privacy,all while compromising my phone,with these add ons.

Ah billionaires,the ones people trust the most!

I would recommend reinstalling windows by going to System Recovery

Hit Reinstall Windows or Downgrade System

If this still doesn’t work, you can downgrade your system from windows 11 to windows 10 or delete recent updates to repair your system.

Usually a system update is the leading cause for system problems.

Roll back updates/downgrade system to delete the update.

Files could possibly be corrupted and not working as they should. Repair your system as shown.

More help with Reinstalling windows below: (Hyperlink)

Reinstall Windows

I hope this helps and you get your system back to working.