What should I do if Ubuntu is installed and restarted after VM Virtualbox?

Recently, some users have reported an abnormality after installing Ubuntu in VM Virtualbox. The same problem still occurs after restarting the system after the program is closed. What is going on? What should I do if the Ubuntu is restarted after the VM Virtualbox is installed?

Method One:

This problem is mainly due to the problem of not uninstalling the iso image. You can click VM VirtualBox to enter the system settings.

The screen deletes the iso system image in the controller IDE and the photo has been deleted.

Then restart the system and you can use it. If it is a black screen, it shows that the memory is relatively small. You can adjust the big point.

Method 2:

Install using VMware software.

The above is a solution to the abnormal restart of Ubuntu after VM Virtualbox installation. Users can handle it through system settings or using VMware software installation.