(cross-post to Vista General added)
"deksawyer" <deksawyer@discussions.microsoft.com> wrote in message
news:84114E8C-5D25-452C-BA35-D4B2D85A70BA@microsoft.com...[color=blue]
> Every time I try to update Vista RC1 5600, windows update fails, giving error
> code C015001A.
>
> I can find no info on this error code.[/color]


Error codes by themselves are almost meaningless.
Context is more important. What is the context?
E.g. look in the WindowsUpdate.log, find that code
and find out in particular what the messages were
*before* it appeared. Especially look at previous error codes
in the same context because generally the first error code can have
more significance than the code being reported. Etc.

[color=blue]
>
> Can anyone help??
>
> D.[/color]


In case there is insufficient context in the log
another tack you might try is guessing what the code means
since it apparently isn't documented anywhere publicly yet.

To do that look most closely at the lower half of the code
and then try to find another one in an existing documented
category with the same one.

E.g. in the usual reference there's:

[url]http://inetexplorer.mvps.org/archive/wuc.htm[/url]

<quote>
0x8020001A -2145386470 BG_S_UNABLE_TO_DELETE_FILES Some of the temporary files could not be deleted. Check the system event
log for the complete list of files that could not be deleted.

</quote>

So, if you guess you have a file permissions problem you could either
doublecheck that idea using FileMon (e.g. filtering on TEMP--as a first
guess about where the temporary files which could not be deleted
might be found) or you could check file and directory permissions
with cacls.exe, perhaps using whatever messages you find in the System
Event log as a guide. Etc.

Hmm... here's a clue in the Vista Release notes.
Were you running elevated or not? E.g. Run as... Administrator
might be necessary to give you sufficient permissions to do whatever
file deletions you are unable to do. (Again, of course, assuming that
the C020001A code actually has a similar meaning to 8015001A
for a different (unknown) process.) Etc.

[url]http://www.microsoft.com/technet/windowsvista/relnotes.mspx[/url]

(Live Search for
"UNABLE_TO_DELETE_FILES" site:microsoft.com
)


HTH

Robert Aldwinckle
---