Microsoft's Software is Malware

Nonfree (proprietary) software is very often malware (designed to mistreat the user). Nonfree software is controlled by its developers, which puts them in a position of power over the users; that is the basic injustice. The developers and manufacturers often exercise that power to the detriment of the users they ought to serve.

This typically takes the form of malicious functionalities.

If you know of an example that ought to be in this page but isn't here, please write to <> to inform us. Please include the URL of a trustworthy reference or two to serve as specific substantiation.

UEFI-induced vulnerability

UEFI makes computers vulnerable to advanced persistent threats that are almost impossible to detect once installed. Here are technical details.

Kaspersky discovered this example by chance, but is unable to check in general for the presence of such rootkits in computers.

Nonfree software does not make your computer secure—it does the opposite: it prevents you from trying to secure it. UEFI is a nonfree program required for booting which is impossible to replace; in effect, a low-level rootkit. All the things that Intel has done to make its power over you secure against you also protect UEFI-level rootkits against you.

Instead of allowing Intel, AMD, Apple and perhaps ARM to impose security through tyranny, we should legislate to require them to allow users to install their choice of startup software, and make available the information needed to develop such. Think of this as right-to-repair at the initialization stage.

Back Doors


Digital restrictions management, or “DRM,” refers to functionalities designed to restrict what users can do with the data in their computers.

  • 2019-04

    Ebooks “bought” from Microsoft's store check that their DRM is valid by connecting to the store every time their “owner” wants to read them. Microsoft is going to close this store, bricking all DRM'ed ebooks it has ever “sold”. (The article additionally highlights the pitfalls of DRM.)

    This is another proof that a DRM-encumbered product doesn't belong to the person who bought it. Microsoft said it will refund customers, but this is no excuse for selling them restricted books.

  • 2007-08

    DRM in Windows, introduced to cater to Blu-ray disks. (The article talks about how the same malware would later be introduced in MacOS. That had not been done at the time, but it was done subsequently.)


These bugs are/were not intentional, so unlike the rest of the file they do not count as malware. We mention them to refute the supposition that prestigious proprietary software doesn't have grave bugs.


This section gives examples of Microsoft software harassing or annoying the user, or causing trouble for the user. These actions are like sabotage but the word “sabotage” is too strong for them.


The wrongs in this section are not precisely malware, since they do not involve making the program that runs in a way that hurts the user. But they are a lot like malware, since they are technical Microsoft actions that harm the users of specific Microsoft software.




Tethers are functionalities that require constant (or very frequent) connection to a server.


Jails are systems that impose censorship on application programs.


Tyrants are systems that reject any operating system not “authorized” by the manufacturer.

As this page shows, if you do want to clean your computer of malware, the first software to delete is Windows.