Once I throttled things down in optimization settings, everything was working again. The Windows 10 update was taking up all the bandwidth. It started downloading it and my entire network slowed to a crawl. I have several Windows 10 devices and I had a new one I was testing an Insider build on. In fact, I have had first-hand experience with this as I live in a rural area and for a while could only get a slow DSL connection. For example, you don’t need Windows update hogging all the bandwidth while you’re trying to watch a movie on Netflix and your kid is gaming online in the other room. This is quite handy for people in rural areas who have a slow or limited internet connection and the household is busy with several connected devices.

Having your PC set to automatically check for updates is an example of a background update.

The background updates are the sneakier ones that happen automatically without any interaction on your part. Or, if you’re downloading an app from the Windows Store, that’s also considered a foreground update. The foreground updates are the updates you start manually – you head to Settings > Update & security > Windows Update. Now, with Windows 10 1803, you can throttle the foreground downloads, too. Microsoft did introduce new delivery optimization settings starting with Windows 10 1709, but it only allowed throttling background downloads. You can limit the amount of upload bandwidth used for other PCs and set a monthly upload limit.

Just check the item you want to limit bandwidth for and use the slider to adjust the percentage it uses.

You have options to limit the bandwidth used for uploads and downloads. Head to Settings > Update & Security > Windows Update > Advanced Options and scroll down and click on Delivery Optimization and on the next screen click the Advanced Options link – told you it is buried deep. Set Bandwidth Limits for Windows 10 Updates

Win10 update download