If you frequently use virtual machines with VirtualBox, it is a more convenient and time-saving solution if you do not create and configure a new virtual machine for each installation, but use the existing ones. In some cases, this can cause problems, such as when you try to start your installer in EFI mode, but it does not want to start. In this short little troubleshooter, we will look at how to start ISO installers on EFI mode virtual machines.

A system recovery flash drive is a bootable device that can be used to save damaged file systems or perform maintenance on them when the operating system is unable to start due to the damage, or even to recover a broken GRUB if it is not working properly. In this description, we will make and test a recovery flash drive, which will not hurt if you are always lurking in your pocket in case there is any problem with your computer later.