How to remove the dual-boot menu?

Right-click on “Start,” then click on “System”. When the “System” page opens, look to the left pane and click on “Advanced system settings”.

Now, go to the “Advanced” tab and click on the “Settings” button under "Startup and Recovery". When the dialogue box appears, select a "default operating system" – you could choose the newer version or the older version.

Uncheck the boxes beside “time to display…” and then click “OK” to save. Afterward, restart the computer, and you won't see the dual-boot menu anymore.

• Press Windows key + R and type “MSConfig” in the Run box.

• Toggle to the “Boot” tab and indicate the version of Windows you want to set as default.

• Click the “Set as Default” option after you have selected your preferred Windows version.

• You can delete the other Windows version by highlighting it and clicking on the “Delete” button.

If you've deleted Windows 7 and decide to stick with Windows 10, you may also think it wise to delete the Windows 7 partition(s) to create more space on your hard disk, right? But if there are files saved on the partition, you will lose them all when you delete the partition. Hence, you should create a disk image of your hard disk and save on an external storage device. Disk images are more advanced than typical backups, because a disk image retains your disk’s statements and deleted data, too.

DiskInternals Partition Recovery is an advanced Windows utility program that helps you create virtual copies of your hard drive in the form of disk images. The program performs data recovery and specializes in recovering deleted or lost Windows partitions. DiskInternals Partition Recovery is compatible with all Windows file systems. Plus, it supports up to 3 data different recovery modes.