I mean, if I installed elementary os alongside windows and I want go back to just having windows, Am I going to have problems with my hdd? Is it going to stay in two parts? I really want to try Elementary Os but I'm scared if maybe I don't like and when I uninstall it, it will give me problems. (I'm sorry because of my gramatical errors, English is not my first language)
Herer's a guide if you want to uninstall elementary OS and keep windows 10: http://www.everydaylinuxuser.com/2016/06/how-to-remove-ubuntu-from-dual-boot.html
I wanted the same thing. I installed Elementary OS on a USB (3) flash drive and completely bypassed the computer's HDD. There are some tricks to this and if you get it wrong, you can screw your HDD, so I suggest following A.I.'s advice. For those who might be crazy enough to do what I did: Use 2 flash drives, one for the installer image, the other as the destination (where you are going to install it). make VERY sure you have the proper device selected for the boot loader AND filesystems (you can manage them separately, so be careful). A high end USB 3 flash drive is almost as fast as an internal HDD but not nearly as fast as an internal SSD. In my case, I modified the system bios to boot the USB if it is available and the HDD if not. This has some risks but means I just unplug the USB flash drive to get back to Windows. Dual boot (as IA pointed us at) is a much better long-term solution. Using a flash drive is nice for testing and deciding if you want to stick with a particular distribution.
