Spotlight no longer works, even though keyboard binding is enabled in preference pane??
Macbook Pro, mid 2014, OSX Yosemite 10.10.2
Does the window pop up, but no results?
if so, open Activity Monitor and see if mds is using lots of CPU%. If so, kill the process.
If no window at all, boot into Safe Mode and see if it works. http://www.etresoft.com/etrecheck