Can any one teach me how to live boot a USB with Kali Linux or dual boot when my processor is not capable of virtualization and also by greeting my previous OS back after I take out the per drive by live USB boot method?

Certainly, I can guide you through the process of live booting Kali Linux from a USB and setting up a dual boot system. Since your processor does not support virtualization, we'll focus on the live USB and dual boot methods. Please note that installing and configuring operating systems involves potential risks, and you should always back up your important data before proceeding.

Live Boot from USB: Download Kali Linux:

Visit the official Kali Linux website: https://www.kali.org/downloads/

Download the appropriate ISO image for your system architecture (32-bit or 64-bit).

Create a Bootable USB:

Use a tool like Rufus (for Windows) or balenaEtcher (for Windows, macOS, and Linux) to create a bootable USB drive from the Kali Linux ISO file.

Boot from USB:

Insert the USB drive into your computer.

Restart your computer and access the boot menu (usually by pressing a key like F2, F12, ESC, or DEL during boot).

Select the USB drive from the boot menu.

Run Kali Linux Live:

Once booted into Kali Linux, you can explore the OS without making any changes to your hard drive.

Dual Boot with Existing OS:

Create Free Space:

Use a partition manager (such as GParted, Disk Management in Windows, or Disk Utility in macOS) to shrink the existing partition and create free space for Kali Linux.

Install Kali Linux:

Restart your computer with the Kali Linux live USB inserted.

During the installation process, choose the "Install" option and follow the prompts.

When prompted for installation type, choose the "Guided - use the largest continuous free space" option.

Configure Boot Loader:

During the installation, the GRUB bootloader will be installed. This bootloader allows you to choose the operating system at startup.

If your existing OS is not detected automatically, you might need to update the GRUB configuration manually.

Restore Previous OS:

If you ever want to remove Kali Linux and revert to your previous OS, you can use the installation media of your previous OS to repair or reinstall its bootloader. This process varies depending on your operating system.

Remember to back up your important data before performing any partitioning or installation. Additionally, the steps might slightly differ based on your system and the version of Kali Linux, so it's crucial to refer to the official documentation or community forums for any specific issues you encounter.