Linux Mint 17 was really slow too and it seemed that it was mainly Linux that was running very slowly in a virtual machine, especially Ubuntu 15.04.

That was strange because various versions of Windows running in virtual machines, were a little slow, but not that bad. It was like wading through treacle navigating menus, windows and applications.

It is best if you have at least 8GB though.Ī problem arose when Ubuntu 15.04 was installed in VirtualBox and the performance was terrible. The main requirement is for lots of memory and it is a struggle with just 4GB of RAM, but it can be done. * Download and run any version of Windows for free in VirtualBoxĪ moderately powerful processor is required, but it does not need to be the top of the range. * The one BIOS tweak you need to boost VirtualBox speed * Speed up VirtualBox enormously with this simple tweak Please let me know what additional information is required to resolve this issue.* Top tips to speed up Windows and Linux in VirtualBox Strangely enough, the issue goes away when I *uninstall* Guest Additions but with GA uninstalled, my host Graphics Adapter is not recognized and the CentOS 7 guests revert to 1024x768 resolution making them difficult to work with. I am using Version 5.2.18 r124319 (Qt5.6.2) on Windows 10 Professional (also completely up-to-date).īoth CentOS 7 guests have the corresponding version of Guest Additions installed in them.

a key press can take 20-25 seconds to register. But the issue remains the same with both of them: they are extremely slow to use e.g.

The other one I rebuilt from scratch today just to be sure. One of the guest is a pre-existing CentOS 7 VM that I've been using for quite a while now. My CentOS 7 VMs are extremely & painfully slow, to the point of being completely unusable. I've run into a very strange problem since updating my laptop from Windows 8.1 to Windows 10 Pro:

Windows 10 virtualbox slow