Accidently deleted boot images and cant get them back

I deleted the boot images from my software library and cant find a way to recreate them. I've tried creating a windows PE boot.wim using the ADK and also importing from a location in the SCCM folder tree. Nether worked. Any advice greatly appreciated.

Error is

Error: Data Source Information
• Source location: \\STR-sc01\E$\Program Files\Microsoft Configuration Manager\OSD\boot\x64\boot.wim
• Boot Image: 1 - Microsoft Windows PE (x64)

Error: Package Information
• Name: boot

Error: Errors
• The specified file can not be imported. Make sure the file is not read only and you have read and write access to it.