Assume that these two systems are usually installed on disk C and disk D, and win7 has been installed on disk C, so it is necessary to place the win10 image file on a partition other than disk C and disk D.

1. Double-click "Install System" directly in the 2010 directory below;

2. In the installation wizard, keep this default option and select the location where you want it to be. To install 2010, like this as Disk D, and confirmed. Disk type C already has a win7 system, so install the 2010 version of the system on the disk D to form one or two;

3. Pop the prompt box up, click "Yes" to restart and confirm immediately , and perform this operation to install the 2010 system on the disk, as shown in the following graphic;

4. Complete the previous steps, restart and directly enter the win7 system, open this " Start the "menu" repair tool "ntbootautofix", and click "auto repair";

5. Start to repair this dual system startup menu. After this repair, close the current window and restart the system;

6. The second startup menu will appear in the startup interface, that is, win7 and 10. Select 2010 here to enter;

7. Enter this new start screen belonging to the 2010 system and start to install the 2010 system;

8. Then suite the 2010 system , continue until the system components are installed and the applications are set up, and wait for a period of time;

9. Enter this desktop that belongs to the 2010 system, and this installation is complete.