You should download and install the latest service pack for SQL Server 2012, Service Pack 2, right now. You can download the software from Microsoft. Microsoft distributes fixes in service packs. Service packs keep the product current. They include hotfixes and fixes to issues that are reported through the Microsoft SQL Server community. Service packs may also include issues that their support organization feels have to be addressed. The most common methods used to determine which issues are resolved first are customer call volume and customer satisfaction scores. These updates and components are conveniently bundled for easy downloading from Microsoft.
Service packs are cumulative. Each new service pack contains all the fixes that are in previous service packs, together with any new fixes. You do not have to install a previous service pack before you install the latest service pack.
You can download the software directly from Microsoft using this link.