Table: Windows Backdoors
|Encryption||Microsoft has backdoored its disk encryption [archive]. Quote:
|Software Choice and Deletion||
Windows User Freedom Restrictions
A number of conscious decisions by Microsoft severely limit user freedoms.
Table: Windows User Freedom Threats
|Trust||The German government wrote: (DeepL translated)
|Forced Updates||Microsoft has a history of updating software without permission [archive]. While configurable update reminders are good for those who forget to regularly update, forced updates are problematic for those that do not wish to.|
The following table highlights Microsoft technical actions that harm users of specific hardware or software.
Table: Windows Sabotage
|Tiered Stability (Updates Testing)||Windows forces lower-paying customers to install new updates and gives higher-paying customers the option of whether or not to adopt them. Quote [archive]:
Microsoft often releases proprietary programs or updates that destabilize or reduce the utility of the user's system:
- Windows displays advertisements [archive] for Microsoft products and those of its partners.
- Windows inserts advertisements inside of File Explorer [archive] to constantly nag about paid subscriptions.
- As noted earlier, Microsoft repeatedly nags to install Windows 10.
- Microsoft has encouraged complaints to system administrators [archive] about not upgrading to Windows 10.
Table: Windows Surveillance Threats
Quoting 2015 version of Windows 10 speech, inking, typing, and privacy FAQ [archive]:
This means Windows is recording the voice of the user and storing it on servers owned by Microsoft. The same website mentions this can be disabled.
But disabling this requires awareness of the issue, skills of using search engines and finding documentation how to do so, and technical skills to disable this privacy intrusion. This is often not the case for non-technical users.
|Telemetry and Personal Data||
|Windows Error Reporting (WER) and Core Dumps Privacy Issues||
Forfeited Privacy Rights
By now the reader should be convinced that just by using any version of Windows, the right to privacy is completely forfeited. Windows is incompatible with the intent of Whonix and the anonymous Tor Browser, since running a compromised Windows host shatters the trusted computing base which is part of any threat model. Privacy is inconceivable if any information that is typed or downloaded is provided to third parties, or programs which are bundled as part of the OS regularly "phone home" by default [archive].
The fact that there is no way to completely remove or disable telemetry requires further consideration. For instance, non-enterprise editions do not permit anyone to completely opt-out of the surveillance "features" [archive] of Windows 10. Quote Even when told not to, Windows 10 just can’t stop talking to Microsoft [archive]. Quote Windows 10 Sends Your Data 5500 Times Every Day Even After Tweaking Privacy Settings [archive]
CheesusCrust also disabled every single tracking and telemetry features in the operating system. He then left the machine running Windows 10 overnight in an effort to monitor the connections the OS is attempting to make.
Eight hours later, he found that the idle Windows 10 box had tried over 5,500 connections to 93 different IP addresses, out of which almost 4,000 were made to 51 different IP addresses belonging to Microsoft.
Even if some settings are tweaked to limit this behavior, it is impossible to trust those changes will be respected. Even the Enterprise edition was discovered to completely ignore privacy settings and anything that disables contact with Microsoft servers.
Any corporation which forces code changes on a user's machine, despite Windows updates being turned off many times before, is undeserving of trust.      Windows 10 updates have been discovered to frequently reset or ignore telemetry privacy settings.  Microsoft backported this behavior to Windows 7 and 8 [archive] for those that held back, so odds are Windows users are already running it.
Opinion by GNU Project
The GNU Project opinion [archive] is that Windows is "Malware", due to the threats posed to personal freedoms, privacy and security, meaning the software is designed to function in ways that mistreat or harm the user.
Opinion by Free Software Foundation
Microsoft uses draconian law to put Windows, the world's most-used operating system, completely outside the control of its users. Neither Windows users nor independent experts can view the system's source code, make modifications or fixes, or copy the system. This puts Microsoft in a dominant position over its customers, which it takes advantage of to treat them as a product [archive].
Microsoft's willingness to consult with adversaries and provide zero days [archive] before public fixes are announced logically places Windows users at greater risk, especially since adversaries buy security exploits from software companies [archive] to gain unauthorized access [archive] into computer systems.  Even the Microsoft company president has harshly criticized adversaries for stockpiling vulnerabilities [archive] that when leaked, led to the recent ransomware crisis world-wide.
Windows is not a security-focused operating system [archive]. Due to Microsoft's restrictive, proprietary licensing policy for Windows, there are no legal software projects that are providing a security-enhanced Windows software fork [archive]. There are security-enhanced Windows software fork(s) but these are not legal and provided by anonymous developers. In contrast, the Linux community has multiple Freedom Software Linux variants that are strongly focused on security, like Qubes OS [archive].
Windows Historic Insecurity
Microsoft updates also use weak cryptographic verification methods such as MD5 and SHA-1. In 2009, the CMU Software Engineering Institute stated that MD5 "...should be considered cryptographically broken and unsuitable for further use".  In 2012, the Flame malware exploited the weaknesses in MD5 to fake a Microsoft digital signature. 
Before Windows 8, there was no central software repository comparable to Linux where software could be downloaded safely. This means a large segment of the population remains at risk, since many Windows users [archive] are still running Windows 7. 
Windows Software Sources
On the Windows platform, a common way to install additional software is to search the Internet and install the relevant program. This is risky, since many websites bundle software downloads with adware, or worse malware. Even if software is always downloaded from reputable sources, they commonly act in very insecure ways. For example, if Mozilla Firefox is downloaded from a reputable website like
chip.de,  then until recently, the download would have taken place over an insecure, plain http connection.  In that case, it is trivial for ISP level adversaries, Wi-Fi providers and others to mount man-in-the-middle attacks and to inject malware into the download. But even if https is used for downloads, this would only provide a very basic form of authentication.
To keep a system secure and free of malware it is strongly recommended to always verify software signatures. However, this is very difficult, if not impossible for Windows users. Most often, Windows programs do not have software signature files (OpenPGP / gpg signatures) that are normally provided by software engineers in the GNU/Linux world.
Tools for software digital signature verification are not installed by default on the Windows platform. Neither SignTool nor gpg4win are installed by default on the Windows platform. These could be manually installed but there is a bootstrap issue. These tools itself would have to be downloaded over https, i.e. only with a very basic form of authentication. In contrast, on the Linux platform usually the GnuPG software digital signature verification tool is installed by default.
For these reasons it is safe to assume that virtually nobody using a Windows platform is regularly benefiting from the strong authentication that is provided by software signature verification.
Windows 10 App Store does not suffer from this issue and does software signature verification but many applications are not available form Windows App Store. In the Windows ecosystem, the culture is software signature verification is less widespread.
In contrast, most Linux distributions provide software repositories. For example, Debian and distributions based on Debian are using apt-get. This provides strong authentication because apt-get verifies all software downloads against the Debian repository signing key. Further, this is an automatic, default process which does not require any user action. Apt-get also shows a warning should there be attempts to install unsigned software. Even when software is unavailable in the distribution's software repository, in most cases OpenPGP / gpg signatures are available. In the Linux world, it is practically possible to always verify software signatures.
No Security From Diversity
The popularity of Windows platforms on desktops actually the risk, as attackers target the near monocultural operating system environment with regularity, for example:
- The Wanna Decryptor ransomware attack [archive] spreading the globe at the time of writing is solely focused on Windows platforms.
- Flaws in Internet Explorer and Edge [archive] have previously allowed attackers to retrieve Microsoft account credentials.
- Point-of-sale terminals running Windows were previously taken over in order to collect customers' credit card numbers [archive].
- Windows uses weak or broken cryptographic verification methods like MD5 [archive] and SHA-1 [archive].
Windows cannot provide security form diversity.
There is no public issue tracker for Microsoft Windows. In comparison for Open Source projects, issue tracker are most often public for everyone (with exception of security issues under embargo until fixed).
It is effectively impossible to directly talk to developers for most people. In comparison for Open Source projects, developers will react to users. For huge protect, at least summary replies to popular issues happen. Often it's possible to talk directly to developers at Open Source meetups, conferences.
When users are having issues and searching for advice, often the advice is to "reinstall Windows". Due to the closed source nature of windows, it's far more difficult to analyze issues and provide bug fixes and workarounds.
It's hard to modify Windows. For example, Qubes Windows Tools for Windows 10 are still not ready.
Windows is less flexible. While with Linux distribution it's easily possible to install them on USB or to swap a hard drive installed in one computer and boot it inside a replacement computer, these are major challenges for Windows users.
Using Earlier Windows Versions is no good Alternative
When users learn about shortcoming, anti-features, spyware features of Windows they often consider as an alternative to not upgrade to a newer version of Windows or to downgrade to an earlier version of Windows.  This is not a solid plan for the future since security support for older versions of Windows is being dropped.
- Microsoft has rapidly dropped support for Windows 7 and 8 on recent processors [archive] following the release of Windows 10.
- Microsoft has made Windows 7 and 8 non-functional on certain new computers [archive], compelling a switch to Windows 10 for many people. For example, support has been dropped for all future Intel [archive], AMD and Qualcomm CPUs [archive].
- Microsoft cuts off support for specific platforms (like XP [archive]) and software such as popular Internet Explorer versions [archive], after a software dependency has developed.
This is also made difficult due to forced upgrades which are mentioned above.
Freedom Software Superiority
Based on the preceding section and analysis, it is strongly recommended to learn more about GNU/Linux and install a suitable distribution to safeguard personal rights to security and privacy. Otherwise, significant effort is required to play "whack-a-mole" disabling Windows anti-features, which routinely subjects users to surveillance, limits choice, purposefully undermines security, and harasses via advertisements, forced updates, and so on.
Open Source software [archive] like Qubes, Linux [archive] and Whonix ™ [archive] is more secure than closed source [archive] software. The public scrutiny of security by design [archive] has proven to be superior to security through obscurity [archive]. This aligns the software development process with Kerckhoffs' principle [archive] - the basis of modern cipher [archive]-systems design. This principle asserts that systems must be secure, even if the adversary knows everything about how they work. Generally speaking, Freedom Software projects are much more open and respectful of the privacy rights of users. Freedom Software projects also encourage security bug reports, open discussion, public fixes and review.
- Microsoft Privacy Statement for Error Reporting [archive]
- https://rcpmag.com/articles/2002/10/03/microsoft-error-reporting-drives-bug-fixing-efforts.aspx [archive]
- https://www.forcepoint.com/blog/security-labs/are-your-windows-error-reports-leaking-data [archive]
- Inside TAO: Documents Reveal Top NSA Hacking Unit [archive]
- https://web.archive.org/web/20170609221304/https://forums.whonix.org/uploads/default/original/2X/0/004857ec71ff2e4b23c88bf596b6142373fe2879.jpg [archive]
- https://web.archive.org/web/20071011010707/http://informationweek.com/news/showArticle.jhtml?articleID=201806263 [archive]
- https://archive.fo/LffTy [archive]
- https://arstechnica.com/information-technology/2015/07/windows-10-updates-to-be-automatic-and-mandatory-for-home-users/ [archive]
- http://voices.washingtonpost.com/securityfix/2007/09/microsofts_stealth_update_come.html [archive]
- https://www.zdnet.com/blog/hardware/confirmation-of-stealth-windows-update/779 [archive]
- https://community.spiceworks.com/topic/1535835-win-10-update-resets-privacy-again [archive]
- This is especially true for users of Tor, who are regularly targeted in this fashion.
- https://en.wikipedia.org/wiki/MD5#cite_note-11 [archive]
- https://arstechnica.com/security/2012/06/flame-crypto-breakthrough/ [archive]
- https://www.chip.de/downloads/Firefox-64-Bit_85086969.html [archive] https://www.webcitation.org/6mgUDIObc [archive]
chip.denow enforces https for its entire website.
Example quote [archive]:
I doubt microsoft is telling everything, im sticking with W7 indefinitely.
Hmm, guess I'm going back to windows 7.
This is why I went from using the beta build as my primary OS back to Windows 8.1.
And now myself and everyone in my family will be staying with their current OS (Windows XP, Vista, 7 and 8.1).
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