donrull :
Windows 8 Pro with Media Center. There is no option to apply to all folders as in previous Windows versions.
USAFRet :
What OS?
In Win8 Pro (probably the same in Win7):
Open Explorer on the C root
Add the Length column
Click on View|Options
Click on the View tab
"Folder views" "You can apply the view......." - Click on 'Apply to Folders'
There is for me in Win 8, looking at it right now. Same as above, add your columns, click on the View ribbon at the top, options on the right, View, Folder view, apply, then it asks to apply to all.