Locate the Drivers and Downloads for your system by Clicking Here.

All the drivers mentioned are installed.  But still I am getting the same error.

If you go into the BIOS, does it see the ethernet adapter?

Find your network adapter

This works with Windows Vista and Windows 7.
This does NOT work with Windows XP or earlier operating systems.
 
Copy the text between the lines and paste it to Notepad.
 

systeminfo >c:\systinfo.txt c:\systinfo.txt

Save the file as systeminfo.cmd

Right click on the systeminfo.cmd and select Run as administrator and it will produce a system information log.
The system log should open up in Notepad.

Go to the bottom of the log.

Here is what mine looks like

Network Card(s):      2 NIC(s) Installed.                                  [01]: Broadcom NetXtreme 57xx Gigabit Controller                                  Connection Name: Local Area Connection                                  Status:          Media disconnected                                  [02]: DW1501 Wireless-N WLAN Half-Mini Card                                  Connection Name: Wireless Network Connection                                  DHCP Enabled:    Yes                                  DHCP Server:     192.168.1.1                                  IP address(es)                                  [01]: 192.168.1.13                                  [02]: fe80::8402:c514:c0c7:d7cd

Copy the network card section and paste it back here.

Name [00000001] 1394 Net Adapter

Adapter Type Ethernet 802.3

Product Type 1394 Net Adapter

Installed Yes

PNP Device ID V1394\NIC1394\A000B000C010

Last Reset 1/21/2012 5:37 PM

Index 1

Service Name NIC1394

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address A2:C5:A7:CF:6F:E5

Driver c:\windows\system32\drivers\nic1394.sys (5.1.2600.5512 (xpsp.080413-0852), 60.38 KB (61,824 bytes), 4/13/2008 8:21 PM)

Name [00000010] Dell Wireless 1395 WLAN Mini-Card

Adapter Type Ethernet 802.3

Product Type Dell Wireless 1395 WLAN Mini-Card

Installed Yes

PNP Device ID PCI\VEN_14E4&DEV_4315&SUBSYS_000B1028&REV_01\4&1B09A299&0&00E3

Last Reset 1/21/2012 5:37 PM

Index 10

Service Name BCM43XX

IP Address 172.25.69.58

IP Subnet 255.255.254.0

Default IP Gateway 172.25.68.1

DHCP Enabled Yes

DHCP Server 172.24.1.2

DHCP Lease Expires 1/21/2012 6:21 PM

DHCP Lease Obtained 1/21/2012 6:06 PM

MAC Address 00:24:2B:34:47:E1

Memory Address 0xF4000000-0xF7FFFFFF

IRQ Channel IRQ 19

Driver c:\windows\system32\drivers\bcmwl5.sys (5.10.38.26, 1.33 MB (1,391,104 bytes), 3/26/2011 8:47 PM)

Name [00000011] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0001

Last Reset 1/21/2012 5:37 PM

Index 11

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:24:2B:34:47:E1

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

Name [00000012] Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC

Adapter Type Ethernet 802.3

Product Type Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC

Installed Yes

PNP Device ID PCI\VEN_10EC&DEV_8168&SUBSYS_026F1028&REV_02\4&139D1158&0&00E4

Last Reset 1/21/2012 5:37 PM

Index 12

Service Name RTLE8023xp

IP Address 0.0.0.0

IP Subnet

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

I/O Port 0x00005000-0x00005FFF

Memory Address 0xF8610000-0xF8610FFF

Memory Address 0xF8600000-0xF86FFFFF

IRQ Channel IRQ 16

Driver c:\windows\system32\drivers\rtenicxp.sys (5.686.0103.2008 built by: WinDDK, 103.38 KB (105,856 bytes), 8/29/2011 8:58 AM)

Name [00000013] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0002

Last Reset 1/21/2012 5:37 PM

Index 13

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

Name [00000002] Microsoft TV/Video Connection

Adapter Type Not Available

Product Type Microsoft TV/Video Connection

Installed Yes

PNP Device ID Not Available

Last Reset 1/21/2012 5:37 PM

Index 2

Service Name NdisIP

IP Address 0.0.0.0

IP Subnet

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

Name [00000003] RAS Async Adapter

Adapter Type Not Available

Product Type RAS Async Adapter

Installed Yes

PNP Device ID Not Available

Last Reset 1/21/2012 5:37 PM

Index 3

Service Name AsyncMac

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Name [00000004] WAN Miniport (L2TP)

Adapter Type Not Available

Product Type WAN Miniport (L2TP)

Installed Yes

PNP Device ID ROOT\MS_L2TPMINIPORT\0000

Last Reset 1/21/2012 5:37 PM

Index 4

Service Name Rasl2tp

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\rasl2tp.sys (5.1.2600.5512 (xpsp.080413-0852), 50.13 KB (51,328 bytes), 4/14/2008 3:00 AM)

Name [00000005] WAN Miniport (PPTP)

Adapter Type Wide Area Network (WAN)

Product Type WAN Miniport (PPTP)

Installed Yes

PNP Device ID ROOT\MS_PPTPMINIPORT\0000

Last Reset 1/21/2012 5:37 PM

Index 5

Service Name PptpMiniport

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 50:50:54:50:30:30

Driver c:\windows\system32\drivers\raspptp.sys (5.1.2600.5512 (xpsp.080413-0852), 47.25 KB (48,384 bytes), 4/14/2008 3:00 AM)

Name [00000006] WAN Miniport (PPPOE)

Adapter Type Wide Area Network (WAN)

Product Type WAN Miniport (PPPOE)

Installed Yes

PNP Device ID ROOT\MS_PPPOEMINIPORT\0000

Last Reset 1/21/2012 5:37 PM

Index 6

Service Name RasPppoe

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 33:50:6F:45:30:30

Driver c:\windows\system32\drivers\raspppoe.sys (5.1.2600.5512 (xpsp.080413-0852), 40.50 KB (41,472 bytes), 4/14/2008 3:00 AM)

Name [00000007] Direct Parallel

Adapter Type Not Available

Product Type Direct Parallel

Installed Yes

PNP Device ID ROOT\MS_PTIMINIPORT\0000

Last Reset 1/21/2012 5:37 PM

Index 7

Service Name Raspti

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\raspti.sys (5.1.2600.0 (xpclient.010817-1148), 16.13 KB (16,512 bytes), 4/14/2008 3:00 AM)

Name [00000008] WAN Miniport (IP)

Adapter Type Not Available

Product Type WAN Miniport (IP)

Installed Yes

PNP Device ID ROOT\MS_NDISWANIP\0000

Last Reset 1/21/2012 5:37 PM

Index 8

Service Name NdisWan

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\ndiswan.sys (5.1.2600.5512 (xpsp.080413-0852), 89.38 KB (91,520 bytes), 4/14/2008 3:00 AM)

Name [00000009] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0000

Last Reset 1/21/2012 5:37 PM

Index 9

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address E8:23:20:52:41:53

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

According to information that you posted, the ethernet adapter is installed and Windows sees it and Dell's latest driver is installed.  But it does not have and IP address assigned.

Ethernet connection

Product Type                   Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC
IP Address                        0.0.0.0
IP Subnet
Default IP Gateway          Not Available
DHCP Enabled                 Yes 
DHCP Server 
DHCP Lease Expires        Not Available
DHCP Lease Obtained     Not Available

Just a crazy question, when does the popup message appear that you referenced in your first post?

Installed it . The adapters are the following  :

Name [00000001] 1394 Net Adapter

Adapter Type Ethernet 802.3

Product Type 1394 Net Adapter

Installed Yes

PNP Device ID V1394\NIC1394\A000B000C010

Last Reset 1/21/2012 5:47 PM

Index 1

Service Name NIC1394

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address A2:C5:A7:CF:6F:E5

Driver c:\windows\system32\drivers\nic1394.sys (5.1.2600.5512 (xpsp.080413-0852), 60.38 KB (61,824 bytes), 4/13/2008 8:21 PM)

Name [00000010] Dell Wireless 1395 WLAN Mini-Card

Adapter Type Ethernet 802.3

Product Type Dell Wireless 1395 WLAN Mini-Card

Installed Yes

PNP Device ID PCI\VEN_14E4&DEV_4315&SUBSYS_000B1028&REV_01\4&1B09A299&0&00E3

Last Reset 1/21/2012 5:47 PM

Index 10

Service Name BCM43XX

IP Address 172.25.69.58

IP Subnet 255.255.254.0

Default IP Gateway 172.25.68.1

DHCP Enabled Yes

DHCP Server 172.24.1.2

DHCP Lease Expires 1/21/2012 6:45 PM

DHCP Lease Obtained 1/21/2012 6:30 PM

MAC Address 00:24:2B:34:47:E1

Memory Address 0xF4000000-0xF7FFFFFF

IRQ Channel IRQ 19

Driver c:\windows\system32\drivers\bcmwl5.sys (5.10.38.26, 1.33 MB (1,391,104 bytes), 3/26/2011 8:47 PM)

Name [00000011] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0001

Last Reset 1/21/2012 5:47 PM

Index 11

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:24:2B:34:47:E1

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

Name [00000012] Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC

Adapter Type Ethernet 802.3

Product Type Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC

Installed Yes

PNP Device ID PCI\VEN_10EC&DEV_8168&SUBSYS_026F1028&REV_02\4&139D1158&0&00E4

Last Reset 1/21/2012 5:47 PM

Index 12

Service Name RTLE8023xp

IP Address 0.0.0.0

IP Subnet

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

I/O Port 0x00005000-0x00005FFF

Memory Address 0xF8610000-0xF8610FFF

Memory Address 0xF8600000-0xF86FFFFF

IRQ Channel IRQ 16

Driver c:\windows\system32\drivers\rtenicxp.sys (5.686.0103.2008 built by: WinDDK, 103.38 KB (105,856 bytes), 8/29/2011 8:58 AM)

Name [00000013] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0002

Last Reset 1/21/2012 5:47 PM

Index 13

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

Name [00000002] Microsoft TV/Video Connection

Adapter Type Not Available

Product Type Microsoft TV/Video Connection

Installed Yes

PNP Device ID Not Available

Last Reset 1/21/2012 5:47 PM

Index 2

Service Name NdisIP

IP Address 0.0.0.0

IP Subnet

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:21:70:CF:92:6A

Name [00000003] RAS Async Adapter

Adapter Type Not Available

Product Type RAS Async Adapter

Installed Yes

PNP Device ID Not Available

Last Reset 1/21/2012 5:47 PM

Index 3

Service Name AsyncMac

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Name [00000004] WAN Miniport (L2TP)

Adapter Type Not Available

Product Type WAN Miniport (L2TP)

Installed Yes

PNP Device ID ROOT\MS_L2TPMINIPORT\0000

Last Reset 1/21/2012 5:47 PM

Index 4

Service Name Rasl2tp

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\rasl2tp.sys (5.1.2600.5512 (xpsp.080413-0852), 50.13 KB (51,328 bytes), 4/14/2008 3:00 AM)

Name [00000005] WAN Miniport (PPTP)

Adapter Type Wide Area Network (WAN)

Product Type WAN Miniport (PPTP)

Installed Yes

PNP Device ID ROOT\MS_PPTPMINIPORT\0000

Last Reset 1/21/2012 5:47 PM

Index 5

Service Name PptpMiniport

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 50:50:54:50:30:30

Driver c:\windows\system32\drivers\raspptp.sys (5.1.2600.5512 (xpsp.080413-0852), 47.25 KB (48,384 bytes), 4/14/2008 3:00 AM)

Name [00000006] WAN Miniport (PPPOE)

Adapter Type Wide Area Network (WAN)

Product Type WAN Miniport (PPPOE)

Installed Yes

PNP Device ID ROOT\MS_PPPOEMINIPORT\0000

Last Reset 1/21/2012 5:47 PM

Index 6

Service Name RasPppoe

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 33:50:6F:45:30:30

Driver c:\windows\system32\drivers\raspppoe.sys (5.1.2600.5512 (xpsp.080413-0852), 40.50 KB (41,472 bytes), 4/14/2008 3:00 AM)

Name [00000007] Direct Parallel

Adapter Type Not Available

Product Type Direct Parallel

Installed Yes

PNP Device ID ROOT\MS_PTIMINIPORT\0000

Last Reset 1/21/2012 5:47 PM

Index 7

Service Name Raspti

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\raspti.sys (5.1.2600.0 (xpclient.010817-1148), 16.13 KB (16,512 bytes), 4/14/2008 3:00 AM)

Name [00000008] WAN Miniport (IP)

Adapter Type Not Available

Product Type WAN Miniport (IP)

Installed Yes

PNP Device ID ROOT\MS_NDISWANIP\0000

Last Reset 1/21/2012 5:47 PM

Index 8

Service Name NdisWan

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\ndiswan.sys (5.1.2600.5512 (xpsp.080413-0852), 89.38 KB (91,520 bytes), 4/14/2008 3:00 AM)

Name [00000009] Packet Scheduler Miniport

Adapter Type Ethernet 802.3

Product Type Packet Scheduler Miniport

Installed Yes

PNP Device ID ROOT\MS_PSCHEDMP\0000

Last Reset 1/21/2012 5:47 PM

Index 9

Service Name

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address E8:23:20:52:41:53

Driver c:\windows\system32\drivers\psched.sys (5.1.2600.5512 (xpsp.080413-0852), 67.50 KB (69,120 bytes), 4/14/2008 3:00 AM)

At least your computer is seeing the ethernet adapter.

Here are your adapters for your information.

Name                    [00000010] Dell Wireless 1395 WLAN Mini-Card Adapter Type        Ethernet 802.3 Product Type        Dell Wireless 1395 WLAN Mini-Card Installed                Yes Name                    [00000012] Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC Adapter Type        Ethernet 802.3 Product Type        Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC Installed                Yes

Download and install this network driver
http://www.dell.com/support/drivers/us/en/19/DriverDetails/DriverFileFormats?DriverId=D6X80&FileId=2731103360

I have windows XP in my system.Please let me know the procedure for it

www.computerhope.com/.../ch000500.htm

Post back what network adapters are shown.

Here are my network adapters:

Name                   [00000007] Broadcom NetXtreme 57xx Gigabit Controller Adapter Type       Ethernet 802.3 Product Type       Broadcom NetXtreme 57xx Gigabit Controller Installed               Yes Name                  [00000012] DW1501 Wireless-N WLAN Half-Mini Card Adapter Type      Ethernet 802.3 Product Type      DW1501 Wireless-N WLAN Half-Mini Card Installed              Yes

It appears each time laptop starts and unable to ethernet LAN .

vaniuser,

Was your operating system recently installed?

Places to look to see if your Connection is enabled

The Finding System Information Tool works for all operating systems. Some virus programs will not allow it to run but it's a harmless tool.

Rick

No. my system is not recently installed. i am having this lan connection problem for a long time and the pop always turns up.

Any help would be greatly appreciated

Any pointers?

vaniuser,

Power off your ISP modem/router. Power off your wireless router(if any) wait 30 seconds. Then power on the ISP modem/router. Wait 15 seconds, then power on the wireless router(if any)

Restart your computer.

Can you connect?

In not, then run and post an ipconfig /all log.

Rick