Berlin - Unwanted files can cripple even speedy computers. Optimisation software promises to help, but in some cases it actually causes harm. It's often more effective to take out the data trash on your own.
"Many applications configure themselves to automatically start up when the operating system boots to look for updates," explains Peter Knaak, technology expert for the German consumer testing organisation Stiftung Warentest in Berlin. "That slows down the startup of Windows significantly."