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In some cases, people even reported that it removed PDF viewers and antivirus programs (perhaps outdated ones). In fact, Microsoft specifically declined to comment when asked about this by Venture Beat.Confusingly, it seems like the Windows update removed these programs from some computers but not others. We also haven’t seen them issue a statement to any other media outlet or a blog post on the subject.But Windows seems to be removing programs that work perfectly fine and Microsoft hasn’t issued a statement about how this works.RELATED: Windows shouldn’t remove any important files, but it may accidentally remove settings or other files associated with a program.You can’t necessarily just copy a program’s files to your current Windows installation, as any registry entries the program depends on may be gone. However, this trick will allow you to recover any files Windows removes. We didn’t actually run into this issue with the November update ourselves, but we’ve seen many reports of it and know people who have.Unless Microsoft changes its mind, Windows 10’s big updates will continue to automatically uninstall various programs without any notice in the future.If a program is known to cause crashes, bugs, or otherwise conflict with Windows, Windows may remove it to keep your system stable.
However, if you’ve removed old Windows installations using Disk Cleanup or manually deleted the folder after the upgrade, it won’t be there.It looks like this feature is designed to help protect the average Windows user, who might have outdated programs installed.Windows can clean them up and make sure they don’t cause problems.You may need to reinstall it again after the next major update to Windows 10, if Microsoft decides to keep removing programs during upgrades.If the program really is incompatible with modern versions of Windows–for example, if it’s an antivirus program that’s several years old–you should probably take the hint and switch to a more modern program, if you can.