: To create a new drive letter (like a "D:" drive), right-click the Start button and select Disk Management . You can shrink existing volumes to create "Unallocated Space" and then select New Simple Volume to set up a new partition.

One of the biggest hurdles users face when trying to drive Windows 11 onto older hardware is the TPM 2.0 (Trusted Platform Module) requirement. If your PC doesn't officially support it, the bootable drive will block the installation.

⚠️ You cannot shrink a volume beyond the point where unmovable files exist (e.g., page files). For aggressive repartitioning, use a third-party tool like EaseUS Partition Master or Minitool Partition Wizard .