This problem is not caused by a program, the notebook has the problems already when starting. I cannot see any failure. it startet, in my opinion, after installing sony software to synch my smartphone. but I uninstalled these programms and still I have the same probs, ok, ist getting better, means, somewhen after booting the system runs, but also when the notebook is going to sleep and I restart the system, always for some minutes the taskbar is not working... but this seems to be the only problem, all other features and processes work probably.