We couldn't create a new partition or locate an existing one

I’ve run into that "We couldn’t create a new partition" error myself a few times during Windows installs. It’s pretty annoying because it usually means something’s screwy with the disk setup. 

In my experience, it’s often a sign of disk issues or leftover partition info messing with Windows. The most common fix involves cleaning the disk and converting it to GPT/MBR as needed, then creating a fresh partition. Be cautious—cleaning the disk erases all data, so back up any important data beforehand. Sometimes, using tools like Diskpart from command prompt or a disk utility from a bootable USB helps fix it. But if you ignore the error and force the install, you might end up with an unstable system or data problems later.  

If you're still get the error "We couldn’t create a new partition"after trying these steps, please share details such as your system type (UEFI or Legacy BIOS), disk type (HDD or SSD, NVMe or SATA), and whether the disk is new or contains previous data.