I was experiencing problems with Ubuntu Desktop like missing and broken system packages, missing Unity package and other problems. So I decided that the best solution (without touching Windows files) is just to reinstall Ubuntu.
I looked everywhere and found the way but got confused as some say that I supposed to choose "Erase Ubuntu and reinstall", others say that I supposed to choose "Something else" and just select it manually while installation. I thought the first option would be better and just safer as I don’t want any of Windows files to be touched but it says that it has a bug that erases all other partitions...
Current Ubuntu version: 17.04 desktop 32bit
will be replaced with 16.04.0 desktop 32bit (as 32bit 17.04 version is no longer available)
What’s the safer option to choose? And if the second one is, how to make sure it’s Ubuntu partition?