Hi,
12.1.671.4971 (RTM) was released last year.
Please upgrade to the latest version i.e. SEP 12.1 RU1 MP1.
Upgrade path is applicable to both SEPM and SEP Clients.
Check till date releases: http://bit.ly/m0vOJp
Upgrade path is as per folllowing:
SEP 12.1.671.4971 --> SEP 12.1 RU1(12.1.1000.157) --> SEP 12.1 RU1 MP1 (12.1.1101.401)
I hope after an upgrade issue should not persist.