Howdy! I have ran Knoppix Live CD (from Nov 2009) on Windows XP. It worked (works) great, but after it the installed Windows XP stopped recognizing the LAN cable as connected. If I start Knoppix it still works, though. Now, I had a similar problem with Mandriva, Vista and sound card, and a solution was that Linux wrote smth into the buffer of the card, so that Windows couldn't see it any more. Don't you know, what could it be here?

Thank you!