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Microsoft's Secure Boot Was Quietly Broken for a Decade โ€” No One Caught It

Ars TechnicaยทThursday, 16 July 2026
Microsoft's Secure Boot Was Quietly Broken for a Decade โ€” No One Caught It

Secure Boot, a core Windows security feature meant to protect PCs from malicious software at startup, has been bypassable for most of its existence due to old, forgotten 'shims' that Microsoft never revoked. Researchers only recently discovered the flaw. This affects a vast range of Windows machines worldwide, including hundreds of millions in India.

Why It Matters

If you use a Windows laptop or desktop โ€” for work, school, or personal use โ€” this vulnerability may have left your device open to deep-level attacks without your knowledge.

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