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- Several users have reported being unable to install Windows 11 due to the cFosSpeed driver error.
- In this case, you wouldn't be able to upgrade using the installation assistant or Windows Update.
- To solve this Windows 11 update error, you could try to uninstall the cFosSpeed driver.
With Windows 11 released for the public, most users have been thrilled to upgrade to the latest iteration. But some faced quite a unique problem – the Windows 11 cFosSpeed driver error.
When users tried to upgrade to Windows 11 via the setup, they received an error that read Your PC has a service that isn’t ready for this version of Windows 11. However, a new version is available.
Does cFosSpeed work with Windows 11?
Most computers have this driver pre-installed, generally those with MSI motherboards. As MSI users reported most commonly that the cFosSpeed driver in Windows 11 is malfunctioning.
While the software is intended to increase network speed, it may sometimes be counterproductive. For example, several users have reported that it decreased their network speed and caused certain websites to slow down.
How do I fix my cFosSpeed driver?
1. Uninstall the driver
The next solution presents an intuitive way to uninstall the cFosSpeed driver from your Windows PC to fix it once and for all.
1. Press Windows + E or click the File Explorer icon in the Taskbar to launch it.
2. Now, navigate to Program Files (x86) in the C: drive, and look for a folder named after the OEM. For example, for MSI motherboards, the folder would be named MSI.
3. Now, check inside the folders listed here for another one named LanManager.
4. If you are facing trouble finding it, a simple way would be to use the Search menu. Press Windows + S, enter LanManager in the text field, click on More, and select Folders from the drop-down menu.
5. Next, locate and double-click on the unins001.exe file, and follow the on-screen instructions to remove the cFosSpeed driver and software.
After the software is uninstalled, the cFosSpeed driver error should be fixed, and you can easily upgrade to Windows 11.
Several users reported that this software reinstalls when you subsequently boot the Windows. In this case, you can uninstall the LanManager itself.
The process differs for various manufacturers; hence you should either check the official website FAQ section or try to locate files that go by the same name to uninstall it.
However, if you want to ensure that you uninstalled the driver successfully and that there are no leftovers, a tool like CCleaner will come in handy.
CCleanerMake sure the programs are successfully uninstalled and no build-ups are left behind with the CCleaner app.
2. Uninstall cFosSpeed from network properties
- Press Windows + R to launch the Run command.
- Type ncpa.cpl in the text field and click on OK or hit Enter to launch the Network Connections window.
- Right-click on the network adapter and select Properties from the context menu.
- Now, locate cFosSpeed under This connection uses the following items and click on Uninstall.
- Click Yes on the confirmation box that appears.
After uninstalling the cFosSpeed driver from the network properties, check if you can install Windows 11. Suppose you can’t locate cFosSpeed here; head to the last solution.
3. Download the cFosSpeed software
- Download the official cFosSpeed software.
- Please navigate to the folder where the downloaded file is stored and double-click on it to launch the installer.
- Click Yes on the UAC prompt that appears.
- Follow the on-screen instructions to complete the installation process.
- Choose the appropriate response in case you receive a prompt.
- Once the installation is done, check if you can upgrade to Windows 11.
If, for some reason, you couldn’t uninstall the cFosSpeed software or couldn’t find it, updating it would be an ideal solution even to fix the Asus cFosSpeed driver error in Windows 11.
After you update the Windows 11 cFosSpeed driver, you should be able to solve the cFosSpeed driver error and upgrade.
The above methods will fix the cFosSpeed driver error and allow you to install Windows 11. However, before you upgrade, read our comparison of Windows 11 and 10 to understand the differences between the two versions better.
If you don’t find Windows 11 worth the hype, do not hesitate to learn how to roll back to Windows 10.
Lastly, let us know which solution worked for you in the comments section below and your experience with the latest iteration of Windows.