By default you cannot access the EFI partition on a Windows PC. If you want to be able to verify that it has the correct files you will need to mount it first. Note the EFI partition is a FAT32 file system.
Open an elevated command prompt and type the following commands:
You will still not be able to see the EFI partition as you need to kill the explorer process and start it with administrative privileges.
Please see the link for more information: