Looking for assistance

[lrubin28]

Boring topic I know, but after 10 days trying to fix this...

I have 3 pcs. The 2 laptops connect fine. Suddenly the desktop, which was wired to the router/modem stopped connecting to the net. I thought it was the integrated adapter (HP Pavillion). I bought a wireless adapter, but same problem. I tested the adapter on another pc and it works fine.

I have done netsh winsock reset dozens of times. Have reset router dozens of times. IPCONFIG/ALL shows the wireless router, but with a 169.x.x.x IP. I manually went into the ipv4 properties and told it to use 192.168.1.100. I've turned off every firewall type program I can find, although my kids do use some peer 2 peer but I think they are all off.

Can anyone please suggest anything else? I know its not the router or the adapter. ARGGGHHHHHH!!

Frustrated in Boston