I have a windows 7 on lenovo G770. Lately I installed the Oracle VM Virtualbox in order to use Linux on windows. Virtualization was activated on bios, however, acceleration button is still greyed out. Above all the VM manager doesn't work and I still receive the following message: VT-x is not available (VERR_VMX_NO_VMX). Please advise

  • Just enabling it in the BIOS isn't enough, your CPU has to support it too. The BIOS switch just allows virtualisation if your CPU supports it. What CPU do you have? – Mokubai Aug 13 '18 at 18:15
  • The error you received is caused by VT-x being disabled it's being used by some feature and/or software. Since you are not running Windows 10, that means very few things could be using it, it basically only leaves security software. The possible duplicates go into detail of what it might be. You either have conflicting software installed or VT-x is not actually enabled. – Ramhound Aug 13 '18 at 18:50
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