Hallo,
First of all sorry for my english, it is not perfect. I`m new to unity3d and I installed it on my PC. After I installed it I opened it, but unity just started without ask me what licence I want. I installed it on my laptop and unity asked me what licence I want. My PC is using Windows 7, but my laptop is isning Windows8. Before half a year I was installed unity on one of my friends and unity3d showed the licence page. On my current PC I reinstalled unity3d but everyrthing was the same. I created a unity account and logged from the asset store. Is it notmal and should I worry about it.
Sounds perfectly normal - your choice to use the “Free” licence (which is what I assume is what you chose) would have been saved from the previous install. If you want to upgrade to the Pro licence, go to https://store.unity3d.com/