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Here's how to Fix CompareExchange128 error during Windows 10 installation.

If you are experiencing a CompareExchange128 error during Windows 10 installation, it is likely caused by a compatibility issue with your CPU. This error can occur when you are installing a 64-bit version of Windows 10 on a computer with an incompatible processor.

Here are some potential solutions to try:

1. Check your CPU compatibility: Go to your computer manufacturer's website or CPU manufacturer's website and check if your CPU is compatible with a 64-bit version of Windows 10. If not, you may need to install a 32-bit version of Windows 10.

2. Check for BIOS updates: Check if there are any BIOS updates available for your computer. Some BIOS updates can add support for newer processors and resolve compatibility issues.

3. Enable virtualization in BIOS: If your CPU supports virtualization, you may need to enable it in your BIOS. To do this, restart your computer and enter the BIOS setup. Look for an option to enable virtualization, and then save and exit the BIOS.

4. Check your RAM: Make sure that your RAM is functioning properly. Run a memory diagnostic tool to check for any errors.

5. Disconnect unnecessary hardware: Disconnect any unnecessary hardware, such as external hard drives, printers, and USB devices. This can sometimes resolve issues with the installation process.

6. Use a different installation method: Try using a different installation method, such as creating a bootable USB drive or DVD, or using a different installation media.

If none of these solutions work, you may need to contact Microsoft support or a professional computer repair service for further assistance.