Error code 80040154 appears when using Windows Update

Hi,
The error code 80040154 appears when I am using Windows Update.
I also receive “Class Not Registered” message. An error happens while checking for new updates for my computer.
And windows could not search for new updates.
What needs to be done to fix this problem?
I need a hand. Thanks a lot.

Most recent check for updates 4/17/2010 at 1:43 PM
Updates were installed 4/17/2010 at 2:17 PM
View update history
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