Thanks for the reply. A few follow-up questoins before I deep dive.
On both the "working" and "non-working systems", I'm using the same p2p programs, like AudioFeast, Gloolabs, AT&TWS Office Online, etc., so please let me know why you think a P2P program will cause challenges.
Also, as troubleshooting, I turned off my firewall software, and the problem was still present so I don't think looking at the events log will help.
Also, I'm working off multiple pc's at home, and don't have a "server" as such, put I can check by pinging my own IP address, but will highly suspect I'll get a response, as at the same time, on my network, can access the "now working" PC for file shares.
Again, I appreciate your insight, just wanted to get a bit more clairification before doing what you recommended.
Warm regardars and I look forward hearing from you.
Dave