Answers...

to commonly asked questions.

Is this microsoft message malware?

Scotty, this message also keeps popping up when it reboots. Malware?

IMG_3153

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This is not malware. This is a common message many people are seeing lately that Microsoft Office. Office wants you to update to the latest version. The best way to go about updating Office would be to open either Word, Powerpoint, or Excel then choose "Check for Updates" under the Help Menu item in the menu bar at the top.
This image is a theme.plist hack