Blog Post

Windows IT Pro Blog
7 MIN READ

Act now: Secure Boot certificates expire in June 2026

Ashis_Chatterjee's avatar
Ashis_Chatterjee
Icon for Microsoft rankMicrosoft
Jun 26, 2025
Prepare for the first global large-scale certificate update to Secure Boot. The Microsoft certificates used in Secure Boot are the basis of trust for operating system security, and all will be expi...
Updated Jul 08, 2025
Version 3.0
security
servicing and updates
windows 10
windows 11
Muthuvel's avatar
Muthuvel
Copper Contributor
Jul 18, 2025

Hi, We do PXE booting for OS deployment using WinPE and Linux. If we submit our new shim.efi now for Microsoft signing, which will be signed with new certificates ( CA 2023) or the older certificates ( CA 2011).