Windows 7′s processor cycles will go through the roof when opening corrupted media files according to an article at Softpedia.

Microsoft explains, “You have some corrupted .wav files in a folder on a computer that is running Windows 7 or Windows Server 2008 R2. When you open the folder, you encounter the following problems: The computer responds slowly. You cannot perform any other operations. You experience high CPU usage in the Explorer.exe process.”

Windows Media Player will stop to respond after opening corrupted .wav files and Wmplayer.exe will also generate high CPU usage according to the company.

Source: Softpedia