Recently, a series of Secure Boot certificates issued by Microsoft for Windows devices back in 2011 have officially reached their expiration dates. In response to this development, major PC manufacturers worldwide are ramping up security measures during the system boot process. They are now rolling out new BIOS firmware updates to refresh the certificates on users' devices. Brands including ASUS, Dell, HP, Lenovo, MSI, and Acer have all published detailed operational guides. Moreover, they are progressively distributing BIOS packages and updated certificates, either through Windows Update or via their official websites, to ensure a seamless transition for users.
