I'm facing problems with installing Windows 7 SP1. I've tried using WU and Manual Update to install KB947821 but in both ways it came withe the same error. I keep getting the message that installation was not successful, with the error code Error: TRUST_E_NOSIGNATURE(0x800b0100).
Also tried System Update Readiness tool but didnt help for me.
The laptop is running on Windows 7 Proffesional 64 Bit.
Really appreciate your help!