I used to have both a Windows 10 disk and another with Lubuntu, but now I left the Lubuntu as the main disk, and removed the other one. I was updating and the following message appears:
I selected the drive and clicked "Continue", which leads me to this:
But i clicked "No" because I don't want to continue if boot might fail afterwards, but doing that takes me back to the first picture. So I am not sure how to proceed to avoid boot problems.
Thanks for any help!