Windows could not search for new updates Code 800F0900

Please follow the Windows Update Posting Instructions and post the requested data

If the file is too large (8MB compressed), remove the older CBSPersist cab files until the final file is below the limit - you can always post them separately after zipping them. (the forum doesn't allow the upload of bare CAB files, for a number of reasons)

Please also post the C:\Windows\windowsudpate.log file



Never mind - found them!

CheckSUR found the following...

Code:

Summary:
Seconds executed: 3086
 Found 5 errors
  CBS MUM Corrupt Total count: 5
Unavailable repair files:
 servicing\packages\WUClient-SelfUpdate-Core-AdmComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.mum
 servicing\packages\WUClient-SelfUpdate-Core-CoreComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.mum
 servicing\packages\WUClient-SelfUpdate-Core-CoreComp~31bf3856ad364e35~amd64~~7.6.7600.256.mum
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.mum
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~~7.6.7600.256.mum
 servicing\packages\WUClient-SelfUpdate-Core-AdmComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.cat
 servicing\packages\WUClient-SelfUpdate-Core-CoreComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.cat
 servicing\packages\WUClient-SelfUpdate-Core-CoreComp~31bf3856ad364e35~amd64~~7.6.7600.256.cat
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~en-US~7.6.7600.256.cat
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~~7.6.7600.256.cat

I'll post a fix protocol later.

I've uploaded a file - mikaa.zip - to my OneDrive at Noel's OneDrive
Please download and save it.
Right-click on the downloaded file, and select Extract all…
Extract to the default location - which will create a new folder mikaa in the same place.
Open this folder - there should be one folder inside it ( Packages)

Copy the content of the Packages folder to the folder
C:\Windows\Temp\CheckSur\Servicing\Packages

Now run the CheckSUR tool again (it may take a while)

Post the new CheckSUR.log file, and the CheckSUR.persist.log file.

CheckSUR is happy now, at least!

Do a new Check for Updates - then attempt to install only the oldest found update.
If it goes in OK, try the rest - if not, then post back with the error code, and KB number.

It helps when you have a machine with (almost) every possible version of (almost) every Win 7 update released on it somewhere... Windows Search then becomes really useful!