Hi AmyWestStreet,
Who is your computer manufacturer?
It is a warning messages related to monitor, indicates that the monitor is out of synchronization.
This means that the monitor cannot synchronize with the signal that it is receiving from the computer. Either the signal is too high or too low for the monitor to use
Note: You may use the buttons on the monitor itself to correct this issue
See the computer documentation that came along with the computer to correct this problem or you may want to contact the computer manufacturer.
Thanks and Regards:
Ajay K
Microsoft Answers Support Engineer
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