Weird unsolved network issues, help please.

[mindyish]

Last month, I upgraded my desktop from vista to Windows 7 Ultimate. I installed 64 bit. PC is dell inspiron 530 (purchased about 2008) And since then, I have been having network issues. I have googled, tried everything I can think of but only thing I can think I haven't asked is if 64 bit just isn't compatible with my pc. I have another desktop which is a dell XPS 410 and also have win 7 ult. and didn't have network issues when I was using it but unfortunately, I think there are some issues I have yet to diagnose with that pc maybe bad sectors or something as even fresh installs of windows left horribly slow running times and freezing up issues.

Anyway, here are the network issues. They started by my pc giving me the "ethernet unplugged" diagnosis after losing internet. However, all wireless devices were still connected to network and running fine. If I bypassed router and hooked pc straight to modem (comcast broadband) desktop worked. However, I need all to work together so I verified ethernets were all fine, renewed IP (ipconfig /release, refresh" it would just start working again after full modem and router reset cycle. But it would never last.

Then, the next day, instead of "ethernet unplugged" i was getting "IP not configured properly" Comcast tech was no help and knew less than I did about pc's. IN PC error reports I see a lot of IP conflict reports. I assigned each device in my network their own IP. Seemed to help for a few weeks. Now, out of no where, I am getting the "ethernet unplugged" again but only after pc sits and inactive for a bit such as overnight or a few hours during the day. A restart of the PC always fixes it though. It's annoying to say the least. Anyone know what it could be and how to fix it?

if additional info is needed here is my cmd ipconfig info:

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.


C:\Windows\system32>ipconfig /all


Windows IP Configuration


Host Name . . . . . . . . . . . . : Genesis_Mindy-P
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No


Ethernet adapter Local Area Connection:


Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82562V-2 10/100 Network Connecti
on
Physical Address. . . . . . . . . : 00-21-9B-05-A8-A2
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b4a9:c731:a4db:7d9f%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, February 16, 2012 6:36:52 AM
Lease Expires . . . . . . . . . . : Sunday, March 24, 2148 3:44:17 PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 234889627
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-8F-D2-3A-00-21-9B-05-A8-A2


DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled


Tunnel adapter isatap.{AB30DF46-7EA0-4D4A-96BB-03D44341183D}:


Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


Tunnel adapter Local Area Connection* 9:


Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:38e6:2906:e7f3:38d5(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::38e6:2906:e7f3:38d5%13(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled


C:\Windows\system32>