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Solved: Windows 8.1 Update Fails With Code 8024401F and WSUS Last Status Report Not Yet Reported


I was getting below error message while running windows update. Below workaround works for me, if you are getting same error message try below workaround,
To check WSUS error/update logs open C:\Windows\WindowsUpdate.log and to get more information to resolve and narrow down your issue.
 
Guide How to Resolve WSUS Error code 8024401f 01
First step to resolve Code 8024401F error is to stop wuauserv from command prompt. To do the same open Run Command Prompt as a Administrator and run net stop wuauserv command as shown below,
 Guide How to Resolve WSUS Error code 8024401f 02
Open  Windows Explorer and Navigate to C:\Windows and renmane SoftwareDistribution directory to SoftwareDistribution-old or anything you like.
 Guide How to Resolve WSUS Error code 8024401f 05
Now start wuauserv by running net start wuauserv command as shown below,
  Guide How to Resolve WSUS Error code 8024401f 03
Now run below two commands to detect WSUS & to report to the WSUS server,
wuauclt  /detectnow
wuauclt /reportnow
After running above two commands wait for 5 to 10 minutes, then you PC will appear in WSUS server Computer list.
 Guide How to Resolve WSUS Error code 8024401f 04
Now you are ready to install updates on PC, just click on Try Again,
Guide How to Resolve WSUS Error code 8024401f 06
 
Apart from above workaround try below workaround if you still face WSUS update issue,
Install and ran software Malwarebytes  Anti Malware and check for Trojan, malware, if you find anything remove it & try to update windows via WSUS.