INATALLATION ERROR FOR WINDOWS 10 20H2 (KB4586781)

Question

There were some problems installing updates, but we'll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x800f081f)

Answer 1

Hello,

Please run Windows Update troubleshooter from Settings app > Update & security > Troubleshoot > Additional troubleshooters. See if it works.

If that doesn't work, try this:

Open administrative Command Prompt and type following commands one-by-one followed by Enter key.

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
Ren C:\Windows\System32\catroot2 Catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Close Command Prompt and see if Windows Updates works then.

Let us know if this helps!

Answer 2

Hi,

Error code 0x800f081f stands for CBS_E_SOURCE_MISSING which means source for package or file not found.

We could try the following measure to add package manually by specifying a source.

We could create a new folder named as C:\temp\cab
Download update package KB4586781 to C:\temp
Run command line below to exact .msu file for getting .cab file.

expand -F:* C:\temp{.msu file name with extension} C:\temp\cab

Run DISM command line below to add .cab file.

Dism /online /add-package /packagepath:c:\temp\cab{.cab file with extension}

Bests,

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