Firstly please check with diskpart it is 3 not 4 as you may have a small MSR partition which is not shown in disk management between system and C. From elevated command prompt:
Originally Posted by spacecon
Identify which partition is for RE by looking at the size (it will be either 3 or 4 - I'll assume 4 here) then still in diskpart:
select disk 0
select partition 4
Then in file explorer you'll see T drive mapped. Check it doesn't look empty from properties (the Recovery directory is hidden system directory so you'd need to show hidden files and unhide system files in file explorer view to see it - there is no need - if the partition properties looks something like this then that will do).
From another elevated command prompt register the image and check.
If it worked then back in diskpart
Reagentc /setreimage /path T:\Recovery\WindowsRE /target C:\Windows
More detailed steps can be found here Deploy Windows RE but you need to check the drive letters (you want to use C not W for the windows directory as you have an existing install).
Let us know if you have a problem.