Let's get back to a new browser tab here, head to spark.apache.org, and click on the Download Spark button:
Now, we have used Spark 2.1.1 in this book, but anything beyond 2.0 should work just fine.
Make sure you get a prebuilt version, and select the Direct Download option so all these defaults are perfectly fine. Go ahead and click on the link next to instruction number 4 to download that package.
Now, it downloads a TGZ (Tar in GZip) file, which you might not be familiar with. Windows is kind of an afterthought with Spark ...