If your PC is very slow sometimes while you are browsing web sites or doing other network related tasks, it may be bogged down with updates consuming your system bandwidth.

With the Fall 2017 Creators Update, you have the ability to control the amount of bandwidth the update process consumes.  If you reduce the bandwidth, it may take longer to complete the downloads/uploads, but your PCs network performance should improve.  Especially if you have a slower network or lower power system.