How to delete ubuntu and windows 7 and then install windows?

My experience in deleting ubuntu and windows 7 and then installing windows is caused by the fact that the system on the hard disk of my computer is a dual system of ubuntu and windows 7, and there are several user accounts in windows 7, in this way, my system is messy and partitions are not very reasonable ....
My experience in deleting ubuntu and windows 7 and then installing windows is caused by the fact that the system on the hard disk of my computer is a dual system of ubuntu and windows 7, and there are several user accounts in windows 7, in this way, my system is messy and partitions are not very reasonable. In order to delete the ubuntu system on the hard disk and reinstall Windows 7 on the hard disk, I did the following: (mainly used tools) I. How to delete the ubuntu system: www.2cto.com 1. some good partition tools are used in Windows 7. I used DiskGenius3.80 in the experiment to implement partition management, to delete the ubuntu system, directly apply this tool to format the corresponding partitions occupied by ubuntu. (However, once the corresponding partition of the ubuntu system is formatted and the computer is restarted, it cannot normally enter the system, because the grub of the system is damaged when formatting the corresponding partition of the ubuntu system, the system cannot be normally entered ). 2. there are many tools to use a USB flash drive to install a new Windows 7 system to create a USB flash drive. here I am using a USB flash drive from a computer store (it is a good tool on the Internet, make boot USB flash drive) to make boot USB flash drive. Finally, you can directly use a USB flash drive to install the system. Here we mainly use two good tools: one is the graphic hard disk partitioning tool DiskGenius and the other is a good tool for starting a USB flash disk.