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Does anyone have a user manual for a PCG-883M
You are using an invalid model type - which is probably why you can't find any documentation.
Have a look on the screen surround - I think you will find the model there. It is probably something like PCG-GR214MP and if it is that model you will find a downloadable User Guide and Software Guide here: -
http://support.vaio.sony.eu/computing/vaio/documentation/manuals/index.aspx?m=PCG-GR214MP&l=en_GB