I got a new laptop and I installed Ubuntu onto it. Before, there was no operating system.
Is there a way I can remove Ubuntu, and get back to having no operating system at all??
yes, if you have Ubuntu Live CD/DVD/USB then you can remove everything from your hard-drive and make it as it was a new.
Follow these steps:
Try Ubuntu options instead of Install UbuntuOnce starts open gparted from your dash or open terminal (CTRL+ALT+T) execute this:
sudo gparted
When gparted starts delete the partition where Ubuntu is installed or delete all partitions and make a new one.
Shutdown your system from Try Ubuntu session.
Thats all.. You have removed each and every bit. Reply if you want further assistance.
Boot a Live CD (such as the Ubuntu installation CD), and use a disk tool such as gparted to delete the partitions. If there's something personal that you want to destroy first, use a program such as "shred" or "wipe"...
https://www.linux.com/learn/tutorials/442455-wiping-your-disk-drive-clean