Q: I have a Msocache folder on my
computer. What is it?
A: When you install Microsoft Office
2003 and later versions, the installation
media is copied to the local computer
into a folder called Msocache. This
copy of the installation files is known
as a Local Install Source. The Local
Install Source lets you avoid having
to insert media when you add Office
components, repair an installation,
or add fixes and service packs. The
Msocache is located on an NTFS
partition that has at least 1.5GB of free
space. If you select the option to Delete
installation files during the Office
installation, then the Msocache folder
is automatically removed. If you want
to remove the Msocache folder after
Office is installed, run Windows’ Disk
Cleanup utility, and after it scans the
drive, select Office Setup Files from the
Files to Delete list. Click OK. You can
only remove the Msocache folder for
an Office 2003 installation; in Office
2007, the folder is a required part of
the design.