This is a MEL error being called from somewhere in your environment (possibly your userSetup.mel?) .
in MEL, commands must be written in the form:
"command -flag -flag <value> objectName;"
Somewhere there is a script calling a command in the form:
"command objectName -LAPTOP;"
And MEL is assuming that "-LAPTOP" is intended to be a flag, and in that case it doesn't like the syntax.
As an experiment, try renaming your Maya preferences folder <userHome>/maya/YEAR to be named something else like <userHome>/maya/YEAR_moveaside . Then relaunch Maya. Hopefully the error is coming from somewhere in that set of preferences, and it will go away with fresh preferences.
