Weird Network Issue
So today when I was checking if I had added a network printer, I noticed something very strange. I looked in My Network Places (WinXP Pro) and I saw a computer on there that wasn't mine. Somehow, a computer not on my network was sharing files with me. I didn't believe it at first, but I double-clicked the shared folder, and it allowed me to access their files!
I have no idea how this happened, but all I can figure is it has something to do with my wireless router that I'm using. I also unshared all of my drives on my network until I can figure out what's up.
Any ideas of how potenally dangerous this is? Or how I can fix it so my network drives require a password?