Finder opens new window each time
Solution 1:
There are many things that could be going wrong here. First of all, make sure that when you navigate to Finder > Preferences > General, the option "Always open folders in a new window" is unchecked. If not, there are many solutions to your problem listed below:
- Naviate to View > Show Toolbar
- Navigate to View > as List, as Columns, or as Cover Flow
- Get TotalFinder (http://totalfinder.binaryage.com/), which adds many more settings to Finder
Good luck!