Regarding “Failed to mount WIM file C:\$WINDOWS.~BT\Sources\SafeOS\winre.wim. Error XxXXXXXXXX”, corruption is usually the cause and you could fix it by performing SFC and DISM scans. Also, depending on the situation, you should run Windows Update troubleshooter, reset Windows update components, check out storage space, clean install, etc. Read to the end to learn what must be done to dismiss the error and get the most out of your Windows PC.

What Might Have Gone Wrong

All in all, it’s not uncommon for errors to get in the way of the update/upgrade of Windows OS. That being said, about “Failed to mount WIM file C:\$WINDOWS.~BT\Sources\SafeOS\winre.wim. Error XxXXXXXXXX”, you must take the suspects down below into account:

  • Corruption
  • Bugs
  • Issues with Windows update components
  • Storage space is inadequate 

How To Deal With The Error

Perform SFC And DISM Scans

  • Step 1: Press Windows key, type cmd and hit Run as administrator to open Command Prompt with administrator privileges. 
  • Step 2: Run the command sfc /scannow in In Command Prompt (Admin) to perform SFC scan. 
  • Step 3: After the SFC scan finishes, proceed to run each of the following commands to perform the DISM scan:
    • DISM /Online /Cleanup-Image /ScanHealth
    • DISM /Online /Cleanup-Image /CheckHealth
    • DISM /Online /Cleanup-Image /RestoreHealth
  • Step 4: Close Command Prompt.
  • Step 5: Restart your computer 

Run Windows Update Troubleshooter

  • Step 1: Press Windows + I to open Settings.
  • Step 2: Choose Update & Security then select Troubleshoot.
  • Step 3: Click Additional troubleshooters and pick Windows Update.
  • Step 4: Hit Run the troubleshooter then let the process run all the way.
  • Step 5: Assuming that the troubleshooter manages to identify the cause, click Apply this fix.

Reset Windows Update Components

  • Step 1: Press Windows key, type cmd and hit Run as administrator to open Command Prompt with administrator privileges. 
  • Step 2: In Command Prompt (Admin), run these commands to stop Update components:
    • net stop wuauserv
    • net stop cryptSvc
    • net stop bits
    • net stop msiserver
    • ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
    • ren C:\Windows\System32\catroot2 Catroot2.old
  • Step 3: To start up Update components again, run the commands down below in Command Prompt (Admin):
    • net start wuauserv
    • net start cryptSvc
    • net start bits
    • net start msiserver
  • Step 4: Restart your computer. 
  • Step 5: When the screen comes back on, determine whether the issue persists. 

Check Out Storage Space

If your computer lacks the space to support the update/upgrade of Windows, “Failed to mount WIM file C:\$WINDOWS.~BT\Sources\SafeOS\winre.wim. Error XxXXXXXXXX” is one of the consequences. Hence, it’s widely advised that you check out the space available in the C: drive of your computer. Feel free to delete stuff to make space for Windows updates/upgrades.

Clean Install 

  • Step 1: Go to another computer, launch the web browser and visit Microsoft’s official website.
  • Step 2: Navigate to Software Download, download the Media Creation Tool and move the tool to a flash drive. 
  • Step 3: Run the tool, choose Create installation media for another PC then select New User Account, version and type of media. Here, you have to use flash drive for installation media. Next, unplug the drive from its current computer and plug it infto your computer. Afterward, turn on your computer and as Windows begins to load, press the BIOS key (F10, F2, F12, F1, DEL, etc). 
  • Step 4: In BIOS, change the boot order to the flash drive so installation media could load up first. Once everything is in order, save the changes and restart your computer. The moment the screen comes back on, follow onscreen instructions to complete the installation of Windows 10. 

Questions And Answers

Should I back up data prior to a Windows upgrade?

In the case that the upgrade proceeds smoothly, you should be able to keep all of your data. However, it won’t hurt to back up data as a precaution. 

What is the length of Windows updates?

In layman’s terms, the length of Windows updates varies from case to case. The size of updates, the processing power of your computer, Internet connection and so on dictate how long Windows updates last. On average, you can expect updates to wrap up within 10 – 20 minutes.

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