Deleting old and obsolete update files can help you recover disk space.
Attention: Deleting a DNS/DHCP Server update file does not stop any updates
that are currently in progress. Deleting the update file only prevents any future
updates from being applied.
Click the Available Updates tab.
Select the checkbox next to one or more update files. (Make sure that the update files are not Enabled.)
Click the down arrow on the Settings button (the
gear icon) and click Delete
Selected.