As of 2015, Kik does not make its Messenger software available for desktop PCs, only for iOS, Android, Windows Mobile and Amazon Fire OS mobile devices. You can run Kik on a PC using an Android emulator, but this takes extra setup.
Kik Messenger offers smartphone and mobile tablet users the chance to send text and video messages, hang out in groups, interact with artificial intelligences that represent various brands and corporations, and communicate online with an extra degree of privacy that comes from using a username rather than your name or phone number.
The app has become especially popular with teens and young adults, who often use it to communicate with friends in lieu of wireless carrier-supported SMS text and MMS picture and video messaging. As such, the company that produces it positions Kik as a mobile-first service that has not been developed or designed to work with desktop Windows or Mac PCs.
You can get Kik to work on your Windows PC, but it takes a bit of extra work in order to make your PC "think" it is a mobile device. Download the Kik Android client from Kik.com, then install the official Google Android Emulator for PC, or install one of the third-party Android emulators like BlueStacks or Andyroid. Google's first-party emulator in particular can be complicated and requires some basic coding knowledge to set it up, although it is the only Android emulator with official support.