How do I find Cortana? I have just installed Windows 10.

[Windows Central Question]

There is no circle to the right of the windows icon in the taskbar.

 

[KuRiouS9]

In case you are outside the US -

First you will have to change 'Region and Language' settings. For this go to desktop control panel and select Clock, Language, and Region from the right hand side
Click on Region and change the following:
In the Format tab, set format as English (United States)
Set Home Location in the Location tab as United States
Finally, in the Administrative tab, set Current System Local to English (United States)

Also, set English (United States) as your primary display language to make the aforementioned changes work fine
In case you have not installed it yet, head over to Add a Language and choose it from the list and then set as primary
After you have made the changes, restart your PC. Once the system is up, you will find Cortana ready to assist you with information you are looking for.

Also, you need to sign in using your Microsoft account. You can either use your keyboard or, microphone to interact with Cortana.

If you are a non-native speaker and not comfortable with pronunciation, you can change the settings accordingly. For this, go to Setting>> choose System>> Speech>> set Speech language as English (US)>> click the box saying Use speech pattern for non native speakers of this language.