Exit Google Chrome completely. ( If Google chrome still open from the tool bar but can’t display you should close it)
Open Windows Explorer window.
In in the address bar type the following:
Windows XP: %USERPROFILE%\Local Settings\Application Data\Google\Chrome\User Data\ Windows Vista/ Windows 7/ Windows 8: %LOCALAPPDATA%\Google\Chrome\User Data\
Locate the folder called “Default” in the directory window that opens and rename it as “Backup default.”