We have 2 computers that were networked together. Shared files, and printer access. Used to work fine. Now, One computer can access MINE, but I cannot access hers, or the Printer anymore. it only works one WAY, BACKWARDS.. We have DSL, fed to a linksys router.. then the ethernet cables to each computer. There is a third computer plugged into the router, but it's strictly for internet access, and not INVOLVED. I have tried deleting and reinstalling the homegroup. no go. MADE sure password on both ends was the same. Where do i look next. the Troubleshooter says it all is working.. HA!

oh yeah, internet access on all three works perfectly. Firewall configuration is where I would look and permissions. You will want to look at this on the system that is refusing the shared connections.

Easy test if it is firewall related would be to disable the firewall on the 1 system that is refusing the sharing. If it all of a sudden STARTS to share then you know that you need to alter the firewall rules/permissions. The fact that you are behind a router it is safe to disable the software firewall on the 1 system as long as all 3 systems are clean and not ready to strike the other with a worm etc.Also, has anybody added new software of any kind on any PC on the network?