This article describes update KB3054870 for Microsoft SharePoint Server 2013 that was released on September 8, 2015. This update has a prerequisite.
Improvements and fixes
Fixes the following issue:
When a site has misspelled words and these words have formatting that's not applied, the spelling check process stops responding, and never finishes. After you apply the update, you'll see an error message that recommends you to run spelling check in Microsoft Word as a workaround.
Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.
You don't have to restart the computer after you install this update.
The global version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.