Win7, Ubuntu dual system correctly uninstall Ubuntu system (experienced)

If ubuntu is not installed in wubi mode, then you should be cautious when uninstalling ubuntu, not directly delete the partition where ubuntu is located, otherwise you will find your windows system also Can't get in. That's because if you install Ubuntu, write GRUB to MBR, which is /dev/sda, (if you open the GURB menu every time you turn it on, it means writing to MBR). Then when you uninstall ubuntu, you will rewrite the MBR and remove the GURB from ubuntu. The correct way to delete ubuntu is as follows: Step 1, fix MBR 1. Enter win7, download a software MbrFix, put it in the C:\\windows\\system32 folder 2. Click Start > All Programs > Attachments command prompt 3. In At the command prompt, type MbrFix /drive 0 fixmbr /yes 4. At this point, MBR has been fixed. After restarting the computer, you will find that there is no Linux boot option. Go directly to Windows. Step 2, delete Ubuntu under Win7, on the computer ( Computer) Right click -> Manage -> DiskManagement: There are 2 no label names (the volume name is the drive letter, such as C:, D:, E:, …) The primary partition (PrimaryPartition) is the partition of Ubuntu, and the window color of the primary partition is dark blue. One of them is the Swap partition, which is about the same size as the machine's physical memory; the other is the root partition, which is about the size you assigned to it. Right click on the two partitions and select Delete Volume. After deleting the volume, the partition window color will turn green and merge into one window. If you don't want to install Ubuntu, you can create an extended partition on this unknown partition, format it, assign the volume label, and use it for Win7. If you want to install Ubuntu, then do not have any operations after deleting the partition.