Skydrive wont stay running on PC, but I can log on….

I have 3 PCs hooked up to a new account, and everything seemed to be going smoothly, until I noticed one of my PCs did not have all the pictures in one folder which is should have had. When I went to look on the main computer where the pictures are, I noticed that the Skydrive program is not running on the notification bar (it's set to always show).  This despite I can log on here - when I enter the Skydrive site I see everything - all folders, but there's picture missing. Furthermore, even though I see the 3 PCS are shown when I log on, when I press on any/all of them it reports "Cant connect to X". When I manually force Skydrive to start (Start/search skydrive, and run) it starts but for only 5 seconds and then it disappears again. If I am quick I can see in settings it is set to fetch files.

The Skydrive folder in my Favorites on my PC only shows the folder names - there is no green wheel running.

Win7 OS - assuming this version WIndows for PC. FibreOp & hardwired with no issues on multiple other media devices.

Was wondering what do I need to do to get it stay running and complete transfer of files to Skydrive? Much appreciated!!

Thanks!