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I'm not running a dual boot system, just Ubuntu on an old laptop that had Windows on it, I've noticed Fast Boot enables in BIOS (UEFI), does it do any harm if I keep it enabled and run Ubuntu only?

ubuntunoob878
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Yes, it can sometime cause conflicts where the underlying Windows structure has "grabbed" control of certain aspects but where UEFI is present on a PC using Linux exclusively, in particular ubuntu, UEFI has good support. Refer to this article for more information.

If windows is present in a dual boot environment,best to make sure that Windows is fully closed down and there are two methods for doing so:

  • Simply hold the Shift key and then click Shut down option in the Start menu;
  • Perform a full shut down using the command prompt enter image description here

reference

graham
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  • Thanks for answering, but what if I'm not running Windows at all? I only have Ubuntu on that device, does it still have any effects? – ubuntunoob878 Jul 17 '21 at 12:14
  • without windows at all ubuntu supports UEFI - you can see how this affects you in [this article](https://www.rodsbooks.com/linux-uefi/) – graham Jul 17 '21 at 12:28
  • That's exactly what I was looking for, thanks! – ubuntunoob878 Jul 17 '21 at 12:31
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    I've amended my answer to reflect the additional information, You may wish to accept it if it answers your question. Thanks – graham Jul 17 '21 at 12:34