Re: installation of KB905866 failed, error 800B0100

[To keep track of things, it helps immensely if you include all of previous message(s) in your replies to the newsgroup. Thank you.]

...i couldn't contact Microsoft Help
and Support through email, it says "An unknown application error
occurred. Please try again in a few minutes."

Did you try again in a few minutes? Is Individual Chat Support one of your options?

Are you able to download/install KB905866 manually using the appropriate link in http://support.microsoft.com/kb/905866?

What anti-virus application or security suite is installed? What anti-spyware applications (other than Defender)? What third-party firewall (if any)?
--
~PA Bear


zyloh89 wrote:
I've downloaded and install the System Update Readiness Tool and ran
auto update to install KB905866, but it still failed.
Is it a must to install it manually? i couldn't contact Microsoft Help
and Support through email, it says "An unknown application error
occurred. Please try again in a few minutes." :confused:
<paste>
PA Bear [MS MVP] wrote:
Description of the System Update Readiness Tool for Windows Vista
http://support.microsoft.com/kb/947821

<QP>
The following table lists error messages that you might receive when you try
to install a software update. These errors might be caused by a system
irregularity that the System Update Readiness Tool might be able to resolve.
However, the tool might be unable to fix all instances in which these errors
occur.

0x800B0100 - TRUST_E_NOSIGNATURE - No signature was present in the subject.
</QP>
===========================
Unlimited installation and compatibility support for Vista SP1 is available
at no charge through 18 Mar-09
• US:
http://support.microsoft.com/oas/default.aspx?ln=en-us&prid=11274&gprid=500921
• CA:
http://support.microsoft.com/oas/default.aspx?ln=en-ca&prid=11274&gprid=500921
• UK:
http://support.microsoft.com/oas/default.aspx?ln=en-gb&prid=11274&gprid=500921
• AU:
http://support.microsoft.com/oas/default.aspx?ln=en-au&prid=11274&gprid=500921
• Other: http://support.microsoft.com/oas/default.aspx | select Windows
Vista | select Windows Vista Service Pack 1

How to obtain the latest Windows Vista service pack
http://support.microsoft.com/kb/935791

Windows Vista SP1 FAQ:
http://windowsvistablog.com/blogs/windowsexperience/pages/windows-vista-sp1-faq.aspx

Windows Vista Service Pack 1 - Things to Know Before You Download:
http://technet.microsoft.com/en-us/windowsvista/bb968859.aspx

Windows Vista Help: Learn how to install Windows Vista Service Pack 1 (SP1):
http://windowshelp.microsoft.com/windows/en-us/Help/133c8953-c9cd-4fa5-8883-03e91bb6f2021033.mspx

zyloh89 wrote:
Windows update kept prompting me to install update KB905866 [April
2008], but always failed and it shows error 800B0100.

My laptop is running Windows Vista Home Premium.

Hope someone is able to help out. Thanks!

.

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