The old view storage is not removed on Windows for dynamic views when recreating a fresh view for each build. This results in the number of "dead" view storage directories on the host growing over time.

With Base CC, a fresh view is always created if the "Create view if view doesn't exist" option is selected.
With UCM CC, a fresh view is created if the "Remove and recreate view on each build" option is selected.

In both the above cases, when trying to remove the old view, the view server process is left running on the windows host, resulting in a lock on the view storage files so they cannot be removed.

Recommend ending the view server process so the storage files can be removed.