Windows has never been able to install this update, and this has gone on for about a week.
ALSO: I did indeed search other threads, none has resolved this for me.
Updates trying to be installed:
When Windows update is ran, a popup is shown saying
"Installation was not successful
A system error prevented the service pack from installing. Please download and run the "Check System Update Readiness" tool at System Update Readiness Tool fixes Windows Update errors in Windows 7, Windows Vista, Windows Server 2008 R2, and Windows Server 2008
If the "Check System Update Readiness" tool doesn't fix the problem, visit the Microsoft Website for more information. (Details)"
along with the error code 800B0100 in "errors found" located under windows update.
I have tried:
-Check System Update Readiness Tool
Installation of Hotfix for Windows (KB947821). Fails and Completes randomly. WU still produces same error: Error: TRUST_E_NOSIGNATURE (0x800b0100)
-Microsoft FixIt and Troubleshooting
Both say Repair Windows Update Components - fixed
-Downloading the Updates from the Download Center
Produces the same error as WU: Error: TRUST_E_NOSIGNATURE (0x800b0100)
No errors found.
I am running Windows 7 Home Premium 64-Bit. The last update installed was KB2553371, according to update history.