Answer:
You might use static ip addressing when your network will be small and you don´t have plans to create a bigger network from this.
Explanation:
When you use static ip addressing you have to configure the routes between hosts manually, is easy to define this rules manually when your network is small because you know all the addresses and the routes to configure. But if your network is bigger and you didn´t know all the host addresses will take a long time to configure this manually.
You could try turning your pc completely off then back on or redownloading your browser
If it’s a file that can only be runned by windows that you wont be able to download it