Out of disk space when installing on Thin client Win7 Embedded

Has anybody else experienced the problem of not having enough disk space on a Win7 embedded thin client?

We recently upgraded our sepm from version 12.1.1 to 12.1.2, to fix a SEP space issue problem mainly on our thin clients.

The thin clients have roughly 1.2 GB available free space and we attempted to push the upgrade to them, but it failed due

to low disk space.  According to the 12.1.2 Admin documentation, 850mb of free space is required to complete the install.  I

thought we could minimize the footprint of the install by only selecting the antivirus protection component; however, Symantec

support stated it actually installs all of the components and just activates those requested.