KB5066835/KB5066128 Update Not Installing Error Code 0x80070306/0x800f081f/0x800f0983 Windows 11 FIX
If you are trying to install update KB5066835 and encounter error 0x80070306 (among others), it essentially means that these error codes indicate Windows Update is unable to reliably retrieve, validate, or apply the update due to corrupted or missing files, broken dependencies, or interfering components. Here are the solutions for these errors.Error 0x80070306
Meaning: “The file or directory is corrupted and unreadable.”
Causes:
Damaged system files or folders needed for the update.
Corruption in the Windows Update cache (e.g. SoftwareDistribution, Catroot2).
Disk errors or bad sectors preventing access.
Security software blocking file operations required by the update.
2. Error 0x800f081f
Meaning: “The source files could not be found.”
Causes:
Required files for the update are missing or inaccessible in the component store (WinSxS).
Registry or policy settings blocking access to online repair sources.
Servicing Stack Update (SSU) dependency missing or not installed.
Incorrect or broken DISM / repair source path specified.
3. Error 0x800f0983
Meaning: A general cumulative update installation failure.
Causes:
Corruption in the component store or update manifests.
Previous updates failed or left the system in an inconsistent state.
Conflicts with installed optional features, language packs, or region-specific files.
SSU missing or not applied before the cumulative update.
Interference from antivirus or system tools that block update processes.
Summary & Interrelation
0x80070306 points to corruption in files or directories that the update needs to access.
0x800f081f suggests Windows can't find the required update files or components.
0x800f0983 is a catch-all failure when the update infrastructure is broken.
Essentially, all three error codes indicate that Windows Update is unable to reliably retrieve, validate, or apply the update due to corrupted or missing files, broken dependencies, or interfering components.
Copy and paste this:
net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc
Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\*.*"
rmdir %systemroot%\SoftwareDistribution /S /Q
rmdir %systemroot%\system32\catroot2 /S /Q
regsvr32.exe /s atl.dll
regsvr32.exe /s urlmon.dll
regsvr32.exe /s mshtml.dll
netsh winsock reset
netsh winsock reset proxy
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc
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》 CHAPTERS 《
00:00 Intro
00:15 Solution #1
01:09 Solution #2
03:06 Solution #3
04:34 Solution #4
08:11 OUTRO Receive SMS online on sms24.me
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