The main problem with this is that many times, the software that's meant to run Skype is either not compatible with your windows or it's just not installed on your pc. In most cases, the process is as simple as finding and then clicking on the "start" button for Skype. Then you'll be prompted to enter your username and password for the Skype account. You should only enter the information once, otherwise your account will be unprofitable. Once your username and password are correctly entered, you'll be prompted to choose your operating system, which is normally Windows 2021 or above.
Once done, you'll be prompted to select the next product or application, and then select "install now" or "save changes as". After that, your Skype main window will appear, and you'll see a progress notification to let you know what's going on. If everything went well, you should be able to receive a call from any location using Skype. Now, if your windows starts to behave strangely, like continually popping on, then there could be problems with the windows installer - to fix this, just uninstall and reinstall Skype again. If everything was OK before, everything should return to normal, and you can go back to your main window and enable Skype as normal.