I recently had a virus on my laptop, its a Dell with Windows XP, after I removed the virus and my laptop started working again. However it kept saying that the PCI needed to be installed but when I try to install it, it ask for software so it can download. I don't have this software, and I'm not sure what it means. Also there is no sound, the volume icon on the task bar doesn't show up. When I try to adjust the volume it says that there isn't an audio device. I don't know if these two are related but if I could receive help with both that would be great!