When Microsoft announced that Windows 11 would require TPM 2.0, Secure Boot, and specific CPU generations, millions of perfectly functional computers were left behind. Rufus developers responded by integrating a "VBS" (Vulnerability Based Scripting) exploit workaround.
The 3.21 branch introduced several under-the-hood improvements that Build 1949 benefits from:
isn’t a revolutionary release—it’s a maintenance update that polishes an already excellent tool. For anyone who needs a dependable bootable USB creator, especially for UEFI systems and modern Linux ISOs, this build is a safe and recommended upgrade. If you’re still using an older version (pre-3.18), updating to 3.21 will bring noticeable improvements in stability and Secure Boot compatibility.
Rufus intelligently handles the split-wim file issue. Modern Windows ISOs often contain install.wim files larger than 4GB. A standard FAT32 format would fail. Rufus 3.21 Build 1949 solves this by automatically splitting the WIM file into smaller segments (install.swm, install2.swm, etc.), allowing the drive to remain FAT32 compatible for UEFI booting while housing large installation files.