erreur 0x800f0991 windows update

Question

Je n'arrive pas à installer la mise à jour KB5066835 sur Windows 11 25H2.
J'obtiens l'erreur 0x800f0991. J'ai donc essayé de l'installer via le répertoire de mises à jour de Microsoft, mais l'erreur persiste. Je ne sais plus quoi faire.

Aidez-moi s'il vous plaît

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Answer 1

Hi Carliez,

Thank you for posting, I am here to help you. This 0x800f0991 error is caused by corrupted files on Windows or corrupted update components. It can also be due to the conflict with other software.

Try this steps to help fix the error.

Step 1: Run Windows Update Troubleshooter

Using Windows 11

Click Start and choose Settings. Go to System then select Troubleshoot. Click Other troubleshooters. Next, under Most frequent, select Windows Update and Run.

Using Windows 10

Click Start then go to Settings. Click Update & Security then select Troubleshoot. Go to Additional troubleshooters. Next, under Get up and running, select Windows Update then Run the troubleshooter.

for more details check this article: Windows Update Troubleshooter

https://support.microsoft.com/en-us/windows/windows-update-troubleshooter-19bc41ca-ad72-ae67-af3c-89ce169755dd#windowsversion=windows_10

Step 2: Reset Windows Update components

Click Start button and search Windows Powershell and press Enter to open.

Once Windows Powershell window is opened enter this command below and wait to complete.

net stop wuauserv

net stop cryptSvc

net stop bits

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

ren C:\Windows\System32\catroot2 Catroot2.old

net start wuauserv

net start cryptSvc

net start bits

netsh winsock reset

After running the commands restart your PC and try to update again.

Let me know how this goes. Looking forward to helping you out.  If you need more help please feel free to let me know. If the answer is helpful, please click "Accept Answer".

Best regards,

Jansher