convert OS from linux to windows 10 in Dell laptop

the Steps to clean window2 10 installation

1. Boot to the system setup interface by keep pushing F2 key. change the configuration for legacy mode. save and exit(F10)
2. restart the computer and keep pushing the F12 key. Select DVD or USB boot option.
3. When prompted, choose your language (English is default).
4. Choose your region (US Default).
5. Choose the Troubleshoot option.
6. Choose Advanced option.
7. Choose Command Prompt, this will open a Command Prompt Window.
8. Type: diskpart then press the Enter key to open the Disk Partition tool
9. Type: list disk then press the Enter key to show all hard disk/Solid State disks seen by the tool
10. Type: select disk 0 or 1(depend on your situation) then press the Enter key (Disk 0 is the hard drive where Windows is normally installed if you have multiple drives)
11. Type: clean then press the Enterkey
12. Type: convert GPT then press the Enter key
13. Type: exit then press the Enter key to exit the Diskpart tool
14. Type: exit then press the Enter key to exit the Command Prompt window