Is suppose to explain the fix but I do not understand Please help.
When downloading the Microsoft Update offline catalog (wsusscan.cab) before
each attempt to scan, downloaded files are checked for a valid Microsoft
digital signature before being used. When the file is missing, or the digital
signature cannot be verified, these errors may occur.
To avoid this error message, it is recommended that the 835732 update be
installed on all Windows 2000 computers running MBSA 2.0 to perform scanning.
These errors may also appear if Internet Explorer is running with the
offline setting, which will prevent MBSA from being able to download the
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