A Hotfix is software patch from Microsoft and is intended
to enhance the working or to correct specific problems
identified with the software.
These are installed in the computer while performing
Windows Update and hence you need not worry about that. I
recommend you do not delete any of the hotfixes which are
listed in the system. Further, you can view information
about the Hotfix by visiting the following URL:
http://support.microsoft.com/default.aspx?scid=fh;
[ln];kbhowto
After visiting the above URL, paste the number(i.e 823559)
in the "Search for" box and select the option "Article ID"
in the "Search Type", then click the "Go" button. This
will display information about the Hotfix. In this way,
you can view the information about the remaining hotfixes
which are listing in the system.
Further, although these hotfixes take up certain space in
the system, they are necessary for the efficient working
of the system.