Error code: 800 b 0100 (cannot install updates)

trying to update & keep getting error 800b0100 TRUST_E_NOSIGNATURE code. That means & how to fix it?



·        What you are trying to update, Windows Vista? If Yes, what are the updates that you try to install on the system (Kb number)?

·        Where you can install the updates on the system before with no problems?

Click on the link below.

Install updates

Certificate for the TRUST_E_NOSIGNATURE chain - has 800b0100 processed, but finished in a root certificate
which is not approved by the trust provider


I suggest you follow the steps mentioned in the article below.

Windows Update error 800b0100

Thanks and regards.

Thahaseena M
Microsoft Answers Support Engineer.
Visit our Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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    I get errors 800 b 0100 for KB981852 for a few months.  I just ran the tool ON and my log is below:

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    2010-09-27 16:23

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    (f) CBS catalogue Corrupt 0x800B0100 servicing\Packages\
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    Watchlist checking

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    (f) clear CSI impossible catalog check winsxs\Manifests\amd64_microsoft-windows-smbserver-common_31bf3856ad364e35_6.1.7600.20740_none_607b009642d9c626.manifest 0 x 00000000 amd64_microsoft-windows-smbserver - common_31bf3856ad364e35_6.1.7600.20740_none_607b009642d9c626
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    County of apparent CSI and S256H Do not Match Total: 2
    Manifest CSI has not catalog check Total number: 4
    CBS MUM corrupt count: 3
    Total number of corrupt CBS catalogue: 4

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    This machine was a fresh install of Win7 Professional (ago installed about 3 months).  Running MS Security Essentials - no infections reported.

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    Jason H. Engineer Support of Microsoft answers visit our Microsoft answers feedback Forum and let us know what you think.

  • Vista - Error Code: 800 b 0100 (cannot install updates)


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    Stefan Blom, Word of Microsoft MVP

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