How or do I need to download Xbox to PC to watch HBO NOW

I'm not sure I fully understand the issue here. If you having issues watching HBO Now on your PC, then you may want to contact HBO support.

Watch Online

Step 1

Ensure that you have a high-speed Internet connection on your laptop. Otherwise, your Internet speed will be too slow to watch HBO TV on your laptop.

Step 2

Subscribe to an online service that allows you to watch HBO TV on your computer. A few of the websites that allow this service are TV Neto, HBO Go and Clicker. In most cases, you will be charged a fee to watch HBO TV online. The exact
fee will vary by service provider.

Step 3

Log in to your online account. Click the links for the specific program you want to watch. Depending upon the site, you may be able to view "Live Streams" in addition to "On Demand" streams.

If a site requires you to download software onto your computer in order to watch HBO TV on your laptop, only do so if you are certain the site is a reputable and legitimate site. Otherwise, the download may contain tracking software
or a virus that can damage your computer.

https://www.techwalla.com/articles/how-to-watch-comcast-cable-on-a-pc

Same here. Xbox one dims while watching game of thrones on HBO Now. This started happening right after the HBO Now received an update. Please HELP.

I wasn't asking if people cared about the subject, simply if they could answer the above question. I can watch HBO GO on my phone, PC, and Fire, but I want to be able to access the app via my xbox so I can watch on a nice sized screen is all. I have HBO,
but HBO GO is way better than say HBO on Demand because GO gives you EVERY episode of a series and has hundreds of movies and whatnot.

Same error. It won't let me watch HBO NOW, now.

My cap is 20 gig a month I watch movies on cable, I don't see why you need xbox to watch syfy or hbo or whatever just use cable.