When Photoshop CC is executed, the first File->Open takes 30 seconds and every File-> Open after that is instant. Why is this?

I have Photoshop CC in my Laptop.  When I first load it/execute photoshop, File -> Open  it takes approx 30 seconds to return a selection.  If I do another File -> Open after this it is instant.

If I Quit Photoshop and reload it the first File -> Open takes another 30 seconds and then instant.  It is only the first Occurrence.

I have a Samsung 840 EVO 250GB SSD 4GB RAM.

If I do  start -> Photoshop -> Previously used file it loads no problem.

If I try the same things with Photoshop CS5 no problem.

Why?

Forgot to add that I am running windows 7 x64 if that makes a difference.