Report KB2670838 Issue in Troubleshooting & Bug Reports Posted July 14, 2020 I came across this post when I got the error message that "Paint.net requires that the Platform Update for Windows is [sic] installed." When I saw that this was KB2670838 I rolled my eyes. Indeed I have blocked this update from appearing on my Windows update list years ago (it somehow got reinstalled anyway, so I had to banish it again, which is when I discovered that PDN stopped working the next time I tried to run it). There are indeed many problems with the KB2670838 update (I search for the details whenever I need to find them by Googling "evil update," if that's a clue!) In my case, it boils down to the fact that Windows Resource Monitor stops working with enlarged (125 dpi) screen resolution. Doesn't sound like a big deal, but after seeing all the other problems reported by others, it just seemed like a very buggy update which was never properly fixed subsequently. The only thing that didn't work for me without this update was IE 10 and IE 11, but who uses IE anyway (I installed IE 9 just incase)? And allegedly some games that I wouldn't care about. But now I find that PDN post 4.0.21 also does not work without this update. The PDN blog post at https://blog.getpaint.net/2018/04/01/paint-net-4-0-22-and-windows-7-platform-update/ explains the dependency. Various posts there by a user email@example.com complained about this dependency, but he was not ummm ... very articulate, shall we say (or perhaps too articulate?), and didn't make his point well. And there were some surly responses by the author along the lines of suggesting that the complainer go back to the stone age if he didn't like updates (though the author's claim that "It’s not even a big update, and it doesn’t break anything" is quite false, as a simple search for "KB2670838 evil update" will reveal--yes, the update is a few years old but when has that meant that it's problem-free when it comes to Microsoft?). Anyway, it was not a productive exchange overall at that blog post and this forum thread seems more so. So my main purpose in writing this forum update is (1) to provide legitimacy (or at least empathy) for those who are indeed having an a problem with KB2670838 and quite rightfully don't want to install it. And (2) to indicate to those people, that indeed going back to version 4.0.21 of PDN would seem to be the only way to continue to use PDN without installing the "evil update" on Windows 7. That is indeed what I plan to do as long as I am on Windows 7, and forsake whatever improvements to PDN have been done since then. The official website for PDN does not seem to have older versions archived for some reason, but it's easy enough to find them. E.g., at <snip> (interestingly, 4.0.21 is the oldest one still on that archive, so get it while you can before it drops off the list). Make sure to do a Custom install and then disable the "Automatically check for updates" option so you don't inadvertently "upgrade" to a version that won't work for you. Incidentally, I found that Plugins are preserved over the Uninstall/Reinstall process (i.e., the Effects folder where plugins are stored was not deleted by the uninstall, although the FileTypes folder was, but perhaps only because it was empty?). If you want to play safe and avoid having to search again for plugins you may have previously installed, you could save the Effects and FileTypes subfolders in C:\Program Files\paint.net\ before uninstalling.