This month’s look at Windows 10 device usage focuses on the most popular PC makers, Anniversary Update deployment, and Surface devices.

As you may recall, AdDuplex bills itself as the largest cross-promotion network for Windows apps. AdDuplex empowers developers and publishers to promote their apps for free by helping each other. And each month it provides a glimpse at which Windows devices people are actually using.

Here’s what we see this month.

HP is number one. As has been the case recently, HP is in the number one spot by usage this month, with 24.3 percent of all PCs worldwide. Dell is up a bit to 15 percent, and Lenovo sits just below 12 percent. ASUS and Acer round out the top five. As AdDuplex notes, there have been no major changes month-over-month.

PC maker popularity varies by country. While US PC usage closely matches what we see worlwide, some countries are quite different. The top three PC makers in Germany, for example, are Acer, HP, Medion, Lenovo, and ASUS, and the differences in usage between them is relatively small.

Windows 10 Anniversary Update is almost fully deployed.Windows 10 version 1607—e.g. the Anniversary Update—is now running on 91 percent of all PCs running Windows 10, so it’s almost fully deployed. More interesting, perhaps, is this chart showing the velocity of the upgrade, which as you’d expect slowed down over time.

Surface Pro is still the most popular Surface device by far (in the US). Last month, AdDuplex looked at Surface device usage worldwide, but this month we see the US. Where, no surprise, Pro 4 is the most popular model by usage, with 34.4 percent. But Pro 3 is very close, at 27.4 percent, and when you include all Pro models, we see that almost 80 percent of all Surfaces in the US are Pro versions. Surface Book is just 7.5 percent.