Windows 7 Proffesional Sp1 error 800B0100

Hello,

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!

Regards,
Mininickroy

Here is the checksur.log:

=================================
Checking System Update Readiness.
Binary Version 6.1.7601.21645
Package Version 13.0
2012-02-16 08:58
Checking Windows Servicing Packages
Checking Package Manifests and Catalogs
(f) CBS MUM Corrupt 0x800F0900 servicing\Packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.mum Line 1: d
(f) CBS Catalog Corrupt 0x800B0100 servicing\Packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.cat
Checking Package Watchlist
Checking Component Watchlist
Checking Packages
Checking Component Store
Summary:
Seconds executed: 654
Found 2 errors
CBS MUM Corrupt Total count: 1
CBS Catalog Corrupt Total count: 1
Unavailable repair files:
servicing\packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.mum
servicing\packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.mum
servicing\packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.cat
servicing\packages\Package_for_KB976933~31bf3856ad364e35~amd64~fi-FI~6.1.7601.17514.cat

I've scannend the laptop with this command: SFC /SCANNOW. In the atteched file you can find the cbs.log.Attachment 199859