I went through many forums and discussions to find solutions for fixing the VT-X Is Not Available error on Windows 10 computer. And, then landed on this page  – Fix VT-X Is Not Available Error.

And it really helped me to fix the error on my computer. So, these are the methods that are given in this guide:

• Disable the Hyper-V Virtualization
• Disable the Core Isolation of Windows Defender
• Enable Avast’s Nested Virtualization Feature
• Uninstall 3rd Party Antivirus Tool From Your Computer
• Enable the VT-X in BIOS Settings

In my case, the last solution did work to fix the error. I hope this will help the users going through this error.