SP1 for Microsoft Office 2013 has all the new updates which help in improving the security, performance, and stability of other Office 2013 products. Additionally, this SP is a roll-up of all previously released updates. You can either install SP1 automatically — your Office 2013 programs will automatically notify you about the update or you can download SP1 and install it on your computer. The latter option is preferable if you have more than one computer where you want to install SP1 — this will ensure that you don’t have to download the large SP1 package multiple times.
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