After enlarging the Windows RE partition and you attempt to re-enable the Windows RE partition using the command reagentc /enable you may get the error "REAGENTC.EXE: The Windows RE image was not found."

Recover the Winre.wim file from installation media using 7Zip

You will need the following to items:

• Original DVD or ISO used to install the operating system
• Latest version of 7Zip

1. Start by downloading and installing the latest version of 7Zip on your computer
2. Download or find the original ISO image for the installed operating system
3. Double click the ISO file in file explorer to view the file contents, and find the install.wim file in the "Sources" folder.
   
4. Right click the install.wim file and choose "7Zip -> Open Archive" from the menu. You will see folders number 1,2,3,etc. Each number corresponds to a different version of Windows. The Winre.wim file should be the same in each folder. Open the first folder and then find \Windows\System32\Recovery
5. Right click the Winre.wim file and choose "Copy To..."
   
6. Enter the path to a folder you have write access to. E.G. C:\Users\<username>.
7. Now find the Winre.wim file you extracted. (You may need to configure Windows Explorer to show hidden files).
8. Copy the Winre.wim file into C:\Windows\System32\Recovery\.
9. Finally run the command reagentc /enable again.
10. Confirm the command succeeded with the message "REAGENTC.EXE: Operation Successful."