Ookkkkkies.
These are just some common mistakes-
-Did u click OverComeMS.exe?
-Are u on version 62?
-If using vista,did u Run and Administrator?
-Are u missing .wz files?
-Are u using the wrong .kik or w/e its called?
What i recommend-
-Restart ur comp
-Make sure ur on the internet
-Try opening it again
-Redownload OverComeMS
If none of those help post here again
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