I just bought a friend's 6 month old laptop, but the sound card doesn't seem to be recognized. First, Windows Media gave me the message "Cannot play back the audio stream: no audio hardware is available, or the hardware is not responding." When I checked the "Device Manager>Sound, video, and game controllers" it listed Audio Codecs, Legacy Audio Drivers, Legacy Video Capture Devices, Media Control Devices, and Video Codecs. System info: Toshiba Satellite A105-S2051 version PSAA2U-049018 serial # 36317718Q Motherboard: ATI SB450 Rev. 0.4b chipset: ATI RS400/133 Host Bridge Can anyone tell me what I need to do to fix this?