Desktop PC causing Laptop to lose internet access

As the title states when I turn on my old PC (Windows XP SP3) my Dell N5110 (Windows 7) laptop loses its internet access (the yellow exclamation mark shows up). When I restart the router the connection is lost after a couple of minutes. Sometimes restarting doesn't fix it at all. Windows Troubleshooter went to the state of fixing this issue, fixing that issue and then there was no status message displayed just the green loading bar flowing into the void. When I turn off the PC, the laptop receives the connection. What kind of a conflict is occurring?

I am using cable broadband internet. My ISP is using my TPLink TL-WR740N router's MAC address. I am using Microsoft Security Essentials and I have disabled my Windows Firewall. Here is my ipconfig:

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

C:\Users\DELL>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : V
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection 4:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter #
2
Physical Address. . . . . . . . . : AC-72-89-22-D2-FC
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe FE Family Controller
Physical Address. . . . . . . . . : 18-03-73-62-E3-AE
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection 3:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter
Physical Address. . . . . . . . . : AC-72-89-22-D2-FC
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Centrino(R) Wireless-N 1030
Physical Address. . . . . . . . . : AC-72-89-22-D2-FB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::912c:fe25:28ca:9349%16(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.101(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 12 юни 2014 г. 17:38:40 ч.
Lease Expires . . . . . . . . . . : 12 юни 2014 г. 19:42:02 ч.
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 430731913
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-36-5F-6C-18-03-73-62-E3-AE

DNS Servers . . . . . . . . . . . : 8.8.8.8
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
#2
Physical Address. . . . . . . . . : AC-72-89-22-D2-FF
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{8E18542F-6475-46DA-AF81-32F0AE860553}:

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 isatap.{DE4AE0F7-A0E1-47CE-815F-A5ED6D2FD000}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter 6TO4 Adapter:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft 6to4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{F3AFCB2C-FB3F-428F-B1CA-3694B4F64CDF}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 14:

Media State . . . . . . . . . . . : Media disconnected
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

C:\Users\DELL>

Can I see the ipconfig/all from the XP machine?

There you go

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Maggie>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : maggie-1a237b26
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethe
rnet NIC
Physical Address. . . . . . . . . : C8-3A-35-D7-A1-8B
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.100
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
Lease Obtained. . . . . . . . . . : 12 Юни 2014 г. 19:34:07
Lease Expires . . . . . . . . . . : 12 Юни 2014 г. 21:34:07

C:\Documents and Settings\Maggie>

Both of the IP's are valid so should be working. I can't imagine why plugging in the XP machine would cause the Win 7 machine to lose it's connection unless something isn't plugged in correctly?

It might help if I could see the ipconfig when the connection is down.

Ok i managed to fix this. When i looked at the network connections of the XP PC there was something else there. It is in bulgarian but i think it was a gateway thing or something. That was disabled and unable to enable. I managed to get rid of it and now im fine. Thanks.