A window flashes across my macbook screen to quickly to read after logging on what could be causing this ?

Hi im having trouble with an issue re my macbook pro. Over the last few days a window flashes on my screen within 30 secs of logging on. Its too quick to read. It only happens once. I never have had this problem before. I dont have great computer skills so any advice would be appreciated. Thanks

Since there is no 19" MBP, would you please identify the EXACT model you have.
http://support.apple.com/kb/ht1349
Use the above to find your MBP serial number and enter it here
:https://selfsolve.apple.com/agreementWarrantyDynamic.do
Open Activity Monitor to ALL PROCESSES and and set % CPU to display values from high to low.
Install iStat Menus:
http://bjango.com/mac/istatmenus/
When your Mac goes into the 'racing condition' post images of both for inspection.
Ciao.

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A window flashes across my macbook screen to quickly to read after logging on what could be causing this ?

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