Changing Windows one build at a time

With ChangeWindows, we want to provide you with a full and as detailed as possible changelog about everything new in Windows.


The color used to indicate a build's main branch is always the color of the lowest ring it is in (the lowest ring is LTSB), otherwise, the color of the branch that applies is used.

What we cover

Building a good and reliable changelog for Windows is a very hard task, which is why we have decided to draw somewhere the line for what we should cover and what we shouldn't. Here are some of our basic rules:

  • Updates are listed with their parent build in the "History" tab on build overviews. On the release timelines and milestone overviews, they are listed individually.
  • The changes between the final preview before and the build that goes out to public are listed under "History", while "Changelog" contains a cummulative changelog of all changes since the last public build.
  • We only cover builds that are part of Windows 8 and any future version. Only Windows 10 builds as of build 10240 contain information about updates, with the exception of Update 1, Update 2 and Update 3 for Windows 8.1.
  • We do not cover app updates that are not related to their build, despite Microsoft mentioning such changes in their announcements. These announcements are always about past app updates that are available to older builds as well. Fresh installing these new builds won't give you the announced versions either without updating through the Windows Store.

Commenting guidelines

We allow you to comment on builds that are listed in our database. Before you comment, we do have some rules:

  • Stay on topic, anything that isn't related to the build will be removed. The comment section is supposed to be a helpful source, an addition to the changelogs themselves.
  • Write in English. Not everyone speaks your language, and as it turns out, most of us do speak English. After all, this website is written in that language.

Version share chart

We keep track of the market share between individual versions of Windows 10 (not builds, versions). This chart is an estimation based on market share. There is a margin of error and the actual numbers might differ.

Privacy Policy

Visitor notice

ChangeWindows does not require you to register or login to use any of the features that are made available. You cannot create your own account. ChangeWindows will never request you to provide any data.

Measuring usage

We measure visitors to our website using Piwik. This records what pages you view within ChangeWindows, how you got here and with what you got here. All of that information is anonymous – so we don’t know who you are; just that somebody visited our site. This information helps us understand which part of our website is being used and which are not. The data that is collected will never be shared with anyone. We do however provide basic statistics every now and then on "A Year In Review" or our Twitter account.

Personal information

ChangeWindows does not distribute personal information to any third parties. Should this change, ChangeWindows will not distribute any information without your prior express consent.


If for some reason you believe ChangeWindows have not adhered to these principles, please notify us by e-mail at, and we will do our best to determine and correct the problem promptly. Be certain the words Privacy Policy are in the subject line.

Changes to this document

Changes to this document may be made any time without warning. ChangeWindows may or may not notify you of changes in this policy, however, we will make an effort to notify you if there are any major changes to this policy. You will not be notified about changes related to clarification and/or elaboration of parts of this policy.

Get it from Microsoft


ChangeWindows exist because of donations, help us to keep this going!


Our changelogs are written based on our own findings while using the build and Microsofts official announcements. However, every now and then, we miss something others found. Since we don't mention sources in our changelogs, here are the third parties we rely on every once in a while (it's rare):

Additionally, some content was used from or provided by the following sources:


ChangeWindows and studio384 are not related to Microsoft in any way. All trademarks mentioned are the property of their respective owners. We do not guarantee the correctness of the information on this site.