New Post: Approved install

2013-09-17 13:21:52:302 1020 984 Misc Validating signature for C:\Windows\SoftwareDistribution\Download\124375b99444efb42e05b70186f74343\725da177cf5d2aafbf9364c783ded7408ac15b79:
2013-09-17 13:21:52:505 1020 984 Misc WARNING: Error: 0x800b0109 when verifying trust for C:\Windows\SoftwareDistribution\Download\124375b99444efb42e05b70186f74343\725da177cf5d2aafbf9364c783ded7408ac15b79
2013-09-17 13:21:52:505 1020 984 Misc WARNING: Digital Signatures on file C:\Windows\SoftwareDistribution\Download\124375b99444efb42e05b70186f74343\725da177cf5d2aafbf9364c783ded7408ac15b79 are not trusted: Error 0x800b0109
2013-09-17 13:21:52:520 1020 984 DnldMgr WARNING: File failed postprocessing, error = 800b0109

Certificate problem or GPO.
Check that certificate is in the right place and the Registry Key :
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AcceptTrustedPublisherCerts = 1