Xwindows Dock Keeping Processor Busy

I am using windows 7 x64 o.s. whenever i open taskmanager i find xwindows dock seemed too busy inspite of the

other processes being too quite.Once i quit Xwindows Dock processor shoots down to 0% otherwise just keep varying without any launch of major application.Please help as my netbook gets too busy with dock.

#539469

Click on show process of all users, you will find that other hidden processes are also using your CPU.

#541673