You want to update your WordPress website or blog to WordPress 4.2.1 immediately for security reasons. Kimberly Castleberry was kind enough provide a link to more detailed information on the importance of this update at Forbes Magazine:
I shot the video tutorial below so you can found out how easy it is to update your site in under 6 minutes.
It’s always a very good idea to backup your site BEFORE updating it and then again AFTER you update it! You can use this free plugin called BackWPup found on WordPress.org. If you can afford to use a premium backup plugin, I highly recommend BackupBuddy which is what I use for all my sites.
If you have any more questions, please let me know!
Check Out Jupiter Jim’s NO COST Marketing System!