Many Computer companies have OED partition in their computer, they may not well distributed disk space, like Dell laptop or desktop, many take much free space on C Drive, or reserved large capacity of size even when the hard drive has only small volume. So we can delete OEM partition in Acer, ASUS, Dell, HP and LENOVO. Etc. We can delete OEM partition using diskpart command line, or using free partition manager software Macrorit Disk Partition Expert.
Diskpart command line is a powerful disk manager in Windows PC, here're the steps to delete OEM partition in Windows 10:
This is the fastest way to delete OEM partition in diskpart; there's another way to do the same job, FYI, still in diskpart:
If you are not sure which one is the OEM partition, you can check it in Disk management, or in our software Partition Expert.
If you are looking for software with friendly graphic-interface instead of command lines, Partition Expert is the best choice to delete OEM partition, here are the steps:
When disk management Delete Volume Greyed out, you can try the methods we introduced to delete partition, not only OEM partition, but also any other partitions, by the way, Delete All Partitions in the option listed in Partition Expert.