This might be a little odd question. The other day I downloaded Ubuntu to try it on a laptop. I used my opensuse machine to create a bootable USB. I started the process and went to sleep. Next morning when I wake up, the computer is at the ubuntu installation screen. turns out that the power went off and restarted the pc with the usb inserted. I removed the USB and restarted the computer, and it booted into the ubuntu installer again, and again, and again. Using the manual menu from the BIOS I was able to choose to boot from HD, and it works prefectly, and Opensuse loads. When I go to the partinioner I notice that for some reason the stupid ubuntu has created a booting partition that I can not delete or do anything. The wierd thing is that I do not have a sdf device in my computer. I did not even run the usb on my computer. How was this possible? and more important, how do I get rid of those ubuntu partitions? **** Ubuntu is like a virus!! help!!
Partitioner picture
https://drive.google.com/file/d/0B96iPTN7ctWRZkcyZ05SZjJmM0k/view?usp=sharing
Well, the Ubuntu installer could only create the partitions on your systems when you actually start it.
And in any case, it definitely cannot create a device (sdf) in your system.
Are you sure you don’t have another USB drive connected (containing Ubuntu) that shows up as sdf?
Maybe your system booted from that one when you removed the “Ubuntu USB stick”?
I did not even run the usb on my computer.
You wrote yourself that you booted into the Ubuntu installer a few times, and now you write you didn’t?
What’s true now? lol!
Anyway, as said above, the installer cannot create a device (sdf) in any case.
Maybe the output of “usb-devices” would give more clues where this sdf comes from… 
Are you sure you don’t have another USB drive connected (containing Ubuntu) that shows up as sdf?
Maybe your system booted from that one when you removed the “Ubuntu USB stick”?
I was writing an answer and posting the results from the command that you suggested. Disconnected everything and kept going to the Ubuntu installer, when I noticed an sd card in a slot that I never use, and completely forgot about it. That SD card must have been there for years, and I did not notice. I have been banging my head for days to resolve this!
Thanks for the simple solution!