Use Signtool.exe (Part of Windows 10 SDK) to sign the respective Rufus Bootloader and NTFS driver using the PFX file. Check which of the two formats is acceptable in db. CER file.Īccess the Secure Boot variables in user mode in Firmware setup and push the CER file into the db key. On a working Windows 10 computer, Run Powershell with Admin privilegesĬreate a self-signed certificate for Code Signing New-SelfSignedCertificate -Type CodeSigningCert -Subject "CN=Test, O=TestCorp, C=US" -KeyUsage DigitalSignature -FriendlyName "M圜ert" -CertStoreLocation "Cert:\CurrentUser\My" -NotAfter (Get-Date).AddYears(5)Īccess the same in the Certificate store and export it with its Private Key to a password protected PFX file.Įxport its Public Key to DER Encoded X509. Assuming target PC is using 圆4 architecture. However, this is how it will work in principle. Many UEFI implementations simply do not allow or do not feel it necessary to offer so. You can use that pen drive for Windows 10 install with Secure Boot ON, on a UEFI computer provided the UEFI Firmware Setup on target computer allows User Level Secure Boot db Key management. When Rufus creates a UEFI bootable NTFS formatted Windows 10 pen drive installer, it creates a small 512KB FAT partition at the end of pen drive and loads it with its own bootloader & NTFS driver, which is not signed (By Microsoft), hence Rufus informs you to disable the Secure Boot for installation. Option 2 – Sign the Rufus Bootloader & NTFS driver. Windows 10 Source files are at C:\src and C:\Slipstremed.iso is the new ISO file created. Oscdimg -LTest -m -u2 -bootdata:2#p0,e,bC:\src\boot\#pEF,e,bC:\src\efi\microsoft\boot\efisys.bin C:\src C:\Slipstremed.isoĪbove oscdimg command creates Legacy + UEFI bootable ISO. Dism /Split-Image /ImageFile:C:\install.wim /SWMFile:C:\install.swm /FileSize:3000 Unlike WIM to ESD conversion, spitting WIM is pretty quick. Windows 10 installer will automatically detect sequenced SWMs and smoothly run and install while Secure Boot is Enabled, as it uses the original Windows 10 Bootloader. Rufus will now allow you to use FAT32 partition as no file inside the ISO is now bigger than 4 GB. Delete the original WIM from the extracted source and using OSCDIMG.exe command (part of Windows 10 ADK) rebuild the ISO using the source that now includes the sequenced SWM files and other Windows 10 source files. Using DISM command (readily available in Windows 10) split the. WIM and then adding your own drivers/packages etc in it is likely to take Windows 10 install.WIM bigger than 4GB. The WIM file is the format where slipstreaming is possible. While OP has already found a solution, I use this answer space to add some more options.
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