Why did I get error 0x8004009D?

Windows Update continous fails to search for Updates or cannot install them. The source of this problem could be various things as
> Windows Registry
> Windows Filesystem
> Internet access

> Windows Update service
> File corruption
> Misconfiguration
> Adware
> Virus and Malware

How to fix Windows Update error 0x8004009D?

However, if you’re technically savvy, you can try the steps below:

1. Click Start and start typing on your keyboard for "services.msc"

2. In your search results "services.msc" should show up. Open it with a click.
3. A new windows will open containing all Windows services on your system.

4. Search for "Windows Update"
5. Right-click the "Windows Update" and then click Stop.

We will now clean the Windows Update temporary cache folder:
1. Hold your windows-key pressed and hit "R" key simultanous.
2. A small new windows will appear.
3. Type %windir%\SoftwareDistribution\DataStore in this new window and click OK.
4. This will open Windows Explorer on the correct location.
5. Delete all contents of this folder. (Hint: Use Ctrl + A to select all files and folders)

Now we will start the Windows Update Service again:
1. Switch back to the windows Services.
2. Locate Windows Update.
3. Right-click on it and choose Start.


If the problem still persists, you can run the System File Checker (SFC) utility. This handy in-built tool will check your filesystem.
1. Click Start and start typing on your keyboard for "cmd".
2. In your search results cmd should show up with an black icon.
3. Right-click it and select Run as administrator.
4. If you are prompted for the admin password, enter the password and click OK.
5. A new completely black windwos will open. You can type commands directly into this window.
6. Type sfc/scannow and press Enter.
7. This process will take a long time. You can minimize this black windows and work on.
Come back to the black window after a time and check if the process finished.
As soon as the SFC process finished, restart your computer. After the restart you search for Updates again.


You are still facing the same issue?

1. Restart your computer.

Next thing is to clean Windows Update download path. These steps are only for expirienced user! If you mess up your computer with Regedit, you could loose your files! Take care or use a professional tool to investiagte your computer.
1. Hold your windows-key pressed and hit "R" key simultanous.
2. A small new windows will appear.
3. Type regedit in this new windows and hit Enter.
4. In the new windows you have a navigation on the left side. Use it to navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
5. Once you found it, search for WUServer and WIStatusServer in the right hand pane.
6. If they are not listet we cannot clean the download path. Othwerwise delete both.
7. Restart your computer.

Try to search for new Updates again.
You are still facing this issue? I think this is not an usual problem and your computer should be checked by professional.
Try to look for a solution here or search further in the search box below.



Advanced information

The following Windows verisons are affected by this error:
> Windows Vista
> Windows 7
> Windows 8
> Windows 8.1
> Windows 10
> Windows 10 Redstone 2
> Windows 10 Creators Update
> Windows Server 2008 R2
> Windows Server 2012
> Windows Server 2016
EventID Disk been surprise removed Time String Generated IOWARNINGDISKSURPRISEREMOVED 04052014 event occurred warning Domain 10172017 0x8004003A 01272015 Hyperv Records 8569892 Repair 120341 05032017 Cannot 27122013 Connect Server NTSTATUS 094719 SYSAdminsru used 094727 configured content assistance product directed correct support httpsupportmicrosoftcomkb220874 120351 external source Regards Dave Patrick Tutorial Magical Number Database MagNumDB Emeritus 091212 091314 UInt32 NTSTATUS0x8004009DL ProgramFilesx86Windows Kits10Include100162990sharedntiologch4090 define 2147745949 2147221347 SystemUInt32 Wand3r3r Quote Sign vote Reply Saturday April 2014 similar record 10212011 1112 getting problem joining machine continue trouble 100244 0x40000004 serious broken between sites KRBAPERRMODIFIED win32 ntiologch received 101547 Kerberos client totally Interface management FACILITYITF COMOLE Error symbol means from methods replication returned designated userdefined codes ErrorCode 0x8005005A 0x8005005C 0x8005005E 0x80050058 0x80050052 0x80050054 0x80050056 Unable Lookup Click 120349 Missing join machines 0x80050050 0x8005003C 0x8005003E 0x80050040 0x8004009C 0x80040098 0x80040099 0x8004009B 0x8005004A 0x8005004C 0x8005004E 0x80050048 0x80050042 0x80050044 0x80050046