Why does enabling Secure Boot stop my PC from starting?

September 15, 2026 1 answer
Asked by MapleOrbit42
Whenever I enable Secure Boot in the firmware settings, my PC refuses to boot. It worked normally around two months ago, but after I stopped using the computer for a while, the problem began. My drivers are current and the system drive uses GPT. I would prefer to troubleshoot the issue rather than reinstall Windows from scratch. What should I check?

Answers

QuietHarbor7
Try disabling Secure Boot temporarily, booting into Windows, and installing any available Windows and motherboard firmware updates. Also check whether your systemโ€™s Secure Boot certificates or keys need updating, then enable Secure Boot again. Some older Secure Boot certificates began expiring recently, which can cause previously working systems to stop booting.

MapleOrbit42: What does updating the Secure Boot certificates involve?

CedarMoth18: Some certificates expired in June. Check Microsoftโ€™s Secure Boot certificate update instructions and follow the steps for your Windows version and hardware.

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