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Error code 800F0900 when installing Vista SP1

mr-frank
mr-frank asked
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Last Modified: 2012-05-06
Hi all,
I'm getting error code 800F0900 when installing Vista SP1 using the standalone installer.

When I try to install using Windows Update it will not download (stays at 0%) and eventually times out with the same error code above.

One suggestion I found said to try installing the Windows Update readiness tool (KB947821) first.  I tried installing this but it stalls while installing the update.

Another suggestion I found on the net said to do an inplace upgrade.  I want to avoid this especially since this is an HP system with no Vista CD so I don't even know how to do an inplace upgrade.  Also don't want to re-install the Apps.

Any suggestions?
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Commented:
Are you using Vista 64 or 32 bit?

The 800F0900 error seems to come from a possible corruption in mmcico.dll. What I recommend doing is download the Vista SP1 from Microsoft, and simply run it that way, rather than using Windows Update. Get SP1 here:
http://www.microsoft.com/downloads/details.aspx?FamilyId=B0C7136D-5EBB-413B-89C9-CB3D06D12674&displaylang=en

Author

Commented:
It is 32bit Vista.

Already tried Vista SP1 standalone installer from Microsoft as stated in question and same error code appears while installing it as going the Windows Update route.
Commented:
This one is on us!
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