what to keep in mind while setting up a virtualbox in Ubuntu

[salim2120]

I'm Using a 64 Bit Ubuntu 16.04.
i downloaded suitable version from virtualbox.org website. While setting Up what are the things i need to be careful about.What are the changes that need to be done in the BIOS.some says to Disable UEFI Secure Boot for the third party software to work.While searching on the Internet lots of errors are happening during running virtual box with some Virtual OS.Mostly occurring errors are "Virtualbox-dkms Package Error."and kernal not supporting error"
Please let me know what are the things to be careful while setting up Virtual box and Using OS in Virtual box?

[armywilter]

have you encountered this: Cannot boot into the liveCD desktop? When you boot the Ubuntu ISO file in your Virtualbox, you will reach a screen with distorted graphics. I also encountered the Virtualbox-dkms error

[codesavior]

hello, this type of error is a quite common problem in Ubuntu. Maybe this video can help you:
https://www.youtube.com/watch?v=b9NKdNZQu8k
https://www.youtube.com/watch?v=ZuCprVx-j0M