I already had Windows 10 on my 128 SSD and I did partition about 230 GB from my 1TB hard drive where I installed elementary OS. Installation was successful and there were no problems.
At start GRUB shows three options: start elementary OS, start elementary OS in recovery mode (or safe mode, do not remember) and start Windows 10. Everytime I try to start elementary OS it shows only the start screen with the elementary logo and then it restarts computer. If I start it in recovery mode, it succesfully starts but I would like to use it in normal mode. Windows 10 works fine. I am quite new to Linux so I have not found solution by myself. Help me, please.
Like Suici Doga said, I removed "quiet splash" line from the kernel parameters. Then it started and I updated. Now it starts normally.