hey all! i read this article before...cause i had the same problem..but i solve it. here is the solution!
first, go to help and support! its in the start} help and support}
second go to restore windows for aperiod of time before!
then..check the programs you installed fro the few days befor!( in my case i found two programs that make this problem, java and i tune!!) and with your knowledge with your own programs , uninstall the impropriet program!
let say it doesnot work,even you deleted these programs..., you can restore your window for two days before! make a backup of you want! then see if the problem still there! if not ..you sould know which program to delete!!
good luck!
amir