Getting /”verr vmx msr locked or disabled/” error when starting up a virtual machine, this will solve your problem. Quick easy fix, maximum 5 minutes.

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1. Go to your BIOS setting (Mash F10 on startup before the windows logo).
2. Go to the system configuration tab
3. Find /”virtualization technology/” and change it to /”Enabled/”
4. Exit with saving changes.
5. Restart your PC and you will have your Virtual Box up and running.
If your BIOS is different to mine, just search around your bios until you find something along the lines of /”Virtual/”

Troubleshooting ———————————-
-You haven’t enabled VT-x in VirtualBox and it’s required for the VM. Open vbox, click the VM, click Settings, System-Acceleration-VT-x check box.
-Your processor doesn’t support VT-x (eg a Core i3).
In this case your BIOS and VirtualBox shouldn’t allow you to try and enable VT-x but if they do, you’ll likely get a crash in the VM.
-Your trying to install or boot a 64 bit guest OS. I think 64 bit OS requires true CPU pass-through which requires VT-x.
-You are trying to allocate more than 3GB of RAM to the VM. Similar to the previous point, this requires: a 64 bit host system; and true hardware pass-through ie VT-x.

http://stackoverflow.com/questions/20647610/verr-vmx-msr-vmxon-disabled-when-starting-an-image-from-oracle-virtual-box

NOTE
Do not mess around with anything else in this menu otherwise it will mess up your computer. Only change what you know.

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