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#1
1) The recovery partition ordinarily does not have a drive letter.
2) Were partitions resized or moved?
3) What troubleshooting steps were performed?
4) Make a backup image using Macrium:
Macrium Software | Your Image is Everything
5) Save the backup image to another disk drive (not another partition on the same drive) or to the cloud
6) Open administrative command prompt and type or copy and paste:
7) sfc /scannow
8) dism /online /cleanup-image /restorehealth
9) chkdsk /scan
10) wmic recoveros set autoreboot = false
11) When these have completed > right click on the top bar or title bar of the administrative command prompt box > left click on edit then select all > right click on the top bar again > left click on edit then copy > paste into the thread
12) Download Windows 10 iso to the desktop
Download Windows 10
1. set drive letter to recovery partition
2. reagentc /setreimage /path F:\Recovery\WindowsRE
...winre.wim registration (use proper drive letter)
3. reagentc /enable
...winre activating
4. remove drive letter from recovery partition
Extract winre.wim and Reagent.xml from your installation media using 7zip.
You will find them in any of the images in the windows\System32\Recovery folder.
Copy them into your C:\Windows\System32\Recovery folder.( overwrite the reagent.xml that is already in there, or rename it reagent.xml.bak before copying the files in )
Then run reagentc /enable command.
Also reagentc makes a log file at \Windows\Logs\Reagent\Reagent.log if you don't tell it to put it elsewhere with /logpath switch.
That should tell you why it can't enable it (wrong partition, missing wim or whatever). You can upload it if it isn't clear.
WinRe can be kept in either
a hidden HDD partition,
in C:\Windows\System32\Recovery\WindowsRE
or in C:\Recovery\WindowsRE
Your use of XPE Requires you to Provide Windows Setup Media as SOURCE
XPE does not use or even look for HOST System Files...