How to make this stop popping up when I open Google Chrome?

[761]

Ok so I have a Sony Laptop IDK what model or whatever cuz I don't know that much about computers. I don't download anything usually because it asks for the administrater's password which is my big brother and he says not to download anything because it ruins the computer and one day I asked him to type in the password and he told me not to but I downloaded it anyways and since that day which was a month ago this has been popping up when I open google chrome "Your preferences cannot be read. Some features may be unavailable and changes to p[references won't be saved."
I googled it and it says to create a new browser and to change the "default" folder to "backup default" and i tryed but it says "You need permission to perform this action" and so What should I do? and btw my big brother deleted the password so now the computer is all in my control . PLEASE HELP???!! and btw my big brother said that the internet is gonna stop working one by one. and by that he meant google chrome will stop working and then internet explorer and then firefox and he's not gona fix it ?! SO PLEASE HELP?

[870]

You will have to reinstall Google Chrome

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