startup program (browser)

[steve thompson <stevetxt@yahoo.com>]

Could someone please point me to how I control start
up
so a program can be made 
made not to start when I boot up?  I installed the 
browser Opera and by mistake selected an option for it
to open at start up.  Now I can not find where that is
controlled to prevent it from happening.  Purging and
reinstalling did not solve it.  

Thanks.

Steve



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