On my laptop (IBM Thinkpad t21) last night while messing I went to play a video and what do you know I had no sound. I thought I muted my synth on the card but it was saying the mixer or something wasn't installed but I have used the sound card before. Is the BIOS on it going out of wack or is it a virus that AVG didn't catch. Also can you install new cards on laptops like video and processors. The reason I ask is because my video card is 8 mb and the processors is 667 megahertz. The vid card is PCI.