Hi All,
How much minimum space required in C drive for sep 12.xx updates to get processed properly without any interruptuion or problem, so that the sep client got updates regularly.
By default, 12.1 keeps 1 content revision. Symantec recommends 1Gb of free space but I would make sure you have 3-4Gb free.
According to the product system requirements, the SEP 12.1.x client requires approximately 850 MB of available hard drive space
Check the article
http://www.symantec.com/docs/TECH153952