Need to upgrade the current server where SEPM is installed

Hi,

have currently W2K3 R2 STD SP2 32Bit. installed. I need to upgrade/reinstall to latest Server 2008 R2 64bit better 2012 64 bit. What would be the best solution? Any help would be GREAT.

SEPM Version is 12.1.4023.4080

SEP Client 12.1.2013.4013

Thanks