You may encounter the Windows 10 Media Creation tool error when you use this tool.
This error is followed by some different alphanumeric error codes.
it’s possible for you to read this post offered byMiniTool Solutionto get some methods to fix this issue.

Typically, the tool will remain dormant.
Another common error is 0x80042405 0xa001a.
Maybe this post Top 7 Ways to Fix Media Creation Tool Error 0x80042405 0xa001ais what you need.

Here are the steps:
Step 1:Press theWindows+Rkeys together to open theRundialog.
Press theOKbutton to confirm.
you might now login as an administrator and spin up the Media Creation Tool.
Then check to see if the issue has been fixed.
Method 2: Disable Your Antivirus
you could also try disabling your antivirus.
Step 2:Navigate to theTurn Windows Defender Firewall on or offtab on the left pane.
Step 1:Press theWin+Ikeys at the same time to openSettingsand then chooseUpdate & Security.
Step 2:ClickWindows Updateand then clickCheck for updateson the right side of the screen.
Step 3:If there are updates available, Windows will start to download them automatically.
Then kickstart your system to perform the installation process.
Method 4: Tweak the Registry
The last method for you is to tweak the registry.
Name the new dwordAllowOSUpgradeand set itsvalueto1.
If you meet the same issue, you could try the methods above to get rid of it.