I recently purchased NIS 2009 and successfully installed. I previously was using a Zonealarm Security Suite which I successfully uninstalled. I'm running Windows XP and no other security products.
I have a wireless network with my TiVo, Wii, and Sat radio using a Linksys WRT54G compact wireless router. For several hours after the NIS install, I had no issues connecting to the internet. The next morning, I couldn't access the internet at all. After determining that my cable modem and service (TWC) was functioning properly, I tried to access the internet by bypassing the router and connecting the cable line directly into the computer and I was able to get a connection. I now have an internet connection on my desktop, but my other devices are now idle since I've lost my wireless connection.
Since I thought the new firewall was blocking my connection, I tried to disable the firewall temporarily and it still did not work.
I checked the history logs through NIS and found several entries of "Default Block SSDP, Inbound TCP Connection", among others.
After searching through the forums, I believe the issue may have to do with tweaking the firewall rules, but I'm not that experienced enough to make a change while still being comfortable that I'm not sacrificing security.
I appreciate any ideas. Thanks.