How to install Win10 Ubuntu dual system, step by step instructions, as detailed as possible

Installing Win10 Ubuntu dual system requires the following steps: 1. Prepare the installation software, including Windows 10 and Ubuntu installation CDs or USB flash drives. 2. Open "Control Panel" in Windows 10, then click "Administrative Tools" and select "Disk Manager". 3. In Disk Manager, select the disk where you want to install Ubuntu, right-click it, and then select "Split Disk" to split the disk into two partitions. 4. Put the Ubuntu installation CD or U disk into the computer, then restart the computer, select boot from the CD or U disk in the startup interface, and enter the Ubuntu installation interface. 5. Follow the instructions of the Ubuntu installation wizard to install the Ubuntu system. 6. After the installation is complete, restart the computer and select Windows 10 in the startup interface.