windows 7 no internet connectivity laptop - Microsoft Community

i have dell inspiron 3542 running windows7 sp1

everything working well, -- 

one day, turned laptop on , had no wireless connectivity

i plugged in ethernet cable, , there still no internet connectivity.

my desktop works on both lan , wireless settings

my phone works on wireless

so -- there 2 problems, lan , wireless.

here both results, let's take lan first.

i'm using desktop diagnose this, laptop not connect web or homegroup

help, please

lan access:

device manager

 device realtec pcie fe family controller

driver updated realtec site:  date 1/23/2017 ver 7.105.123.2017

device working properly

windows network diagnostics results:

"local area connection" doesn't have valid ip configuration -- not fixed.

wi-fi

device manager:

device -- dell wireless 1705 802.11b/g/n (2.4ghz)

manufacturer: atheros communications

location pci bus 6, device 0, function 0

device working properly

network diagnostics

"windows cannot resolve wireless connectivity issue"

detailed description

problems wireless adapter or connectivity point detected -- yellow triangle

result of diagnosis: there may problem

hi,

check dell support,  on-line documentation, drivers/firmware, diagnostics, , ask in forums known issues.

dell support
http://support.dell.com/

dell drivers - product manuals & warranty info (left side) - tech support , more
http://support.dell.com/support/index.aspx?c=us&l=en&s=dhs

dell forums
http://en.community.dell.com/forums/

dell pc diagnostics
http://www.dell.com/support/diagnostics/us/en/19/

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wired , wireless network connection problems in windows - scroll "connectivity"
https://support.microsoft.com/en-us/products/windows?os=windows-7

why can't connected?
https://support.microsoft.com/en-us/help/15287/windows-why-can-not-get-connected

why internet connection slow?
https://support.microsoft.com/en-us/help/15091/windows-7-why-internet-connection-so-slow

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references vista apply windows 7.

router suspect here, have updated firmware possible
solution? and update wifi drivers on computers. how far
positioned router? there obstructions in way?

try updating driver , clearing network logon.

control panel - network - write down make , model of wifi - double click
on - driver's tab - write down version - click update driver (may not do
ms far behind certifying drivers). right click on wifi
device , uninstall - reboot - refresh driver stack.

manually @ manufacturer's sites drivers - , device maker's sites.
http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm

installing , updating drivers in windows 7 (updating drivers manually
using methods below preferred ensure latest drivers system
maker , device makers found)
http://www.sevenforums.com/tutorials/43216-installing-updating-drivers-7-a.html

download - save - go put - right click - run admin.

can download several @ once reboot after install each one.

after looking @ system maker's can check device maker's
newer versions. (the ones system maker become fallbacks).

repeat above network card (nic) , time other updated
drivers windows 7 loves updated drivers.

disable auto-updates drivers. if windows updates suggests
1 hide alway old , can drivers
manually needed.

how stop windows 7 automatically installing drivers
http://support.microsoft.com/kb/2500967

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make sure know login details wireless router - ssid , password.

lose connection when doing , have redo logon.

control panel - network & sharing center - on left side click manage
wireless networks - right click networks - remove networks -
reboot. start - connect to - logon on network.

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check :

strange problem internet connection in vista (and windows 7)
http://www.catonett.com/blog/archives/194

windows vista cannot obtain ip address routers or non-microsoft dhcp servers
http://support.microsoft.com/kb/928233/en-us

----------------------------------------------------

, :

using network troubleshooter in windows 7
http://windows.microsoft.com/en-us/windows7/using-the-network-troubleshooter-in-windows-7

troubleshoot network connection problems
http://windowshelp.microsoft.com/windows/en-us/help/33307acf-0698-41ba-b014-ea0a2eb8d0a81033.mspx 

why can’t connect network?
http://windows.microsoft.com/en-us/windows7/why-can-t-i-connect-to-a-network

hope helps.
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rob brown - microsoft mvp <- profile - windows , devices it : bicycle - mark twain said right.

Windows / Windows 7 / Network & internet