VirtualBox

How To Fix Failed to open a session for the virtual machine, Failed to construct device ‘usb-ehci’ instance

Recently, when I start an existing virtual machine in Oracle VirtualBox Manager, it throws the error Failed to open a session for the virtual machine, Failed to construct device ‘usb-ehci’ instance. This article will tell you how to fix it.

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How To Change The Virtualbox Guest macOS Virtual Machine Screen Resolution

After installing macOS on VirtualBox virtual machine, when I start it, I found the screen resolution is too low to display the whole screen bigger. So I need to change the macOS virtual machine’s screen resolution to make the screen fully fill the virtual machine’s window. This article will tell you how to do it.

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How To Fix The Error Unable To Insert The Virtual Optical Disk VBoxGuestAdditions.iso Into The Machine

After installing the virtual machine in VirtualBox, I want to change the virtual machine’s screen resolution in the virtual machine. So I click the VirtualBox Manager or Virtual Machine’s Devices —> Insert Guest Additions CD image… menu item. But it shows the error message like Unable to insert the virtual optical disk C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso into

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