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Windows 7: Wireless Internet connection lost after a few seconds

25 Jan 2012   #1

Windows 7 Professional
Wireless Internet connection lost after a few seconds


my wife has a strange problem with her HP ProBook 4330s laptop (running Windows 7 Professional). We recently got a new Linksys E3000 wifi router which started the problems.

The laptop can see the wireless networks (there are two wireless networks since it's a 2.4GHz/5GHz dual band router) and even connect to any of the two networks. It also gets an IP address from the DHCP server and the Internet connection starts working for a very short period (5-10 seconds). Then the connection is lost and though it occasionally returns, the computer is unable to access Internet most of the time. Apparently, it doesn't even get to the gateway. If I ping to the router's IP address there's no response, except for during the first few seconds after establishing the connection:

--- CONSOLE --->
C:\Users\Martina>ping -n 1000

Příkaz PING na - 32 bajtů dat:
Odpověď od bajty=32 čas=1ms TTL=64
Odpověď od bajty=32 čas=2ms TTL=64
Odpověď od bajty=32 čas=24ms TTL=64
Odpověď od bajty=32 čas=1ms TTL=64
Odpověď od bajty=32 čas=1ms TTL=64
Odpověď od bajty=32 čas=1ms TTL=64
Vypršel časový limit žádosti.
Vypršel časový limit žádosti.
<--- CONSOLE ---

Apologies for the Czech locale, but I guess you get the idea (the last two lines are something like "no response from host").

This behavior is absolutely consistent and can be observed each time one connects to the Linksys router from this laptop. Nothing I have tried has helped. The list includes: rebooting the laptop, rebooting the router, disabling one of the two wireless networks on the router, trying out various encryption settings (open, wep, wpa2), changing channels, disabling/enabling b/g/n modes, disabling firewall on the laptop, disabling ESET antivirus, reinstalling the wireless adapter driver, ... I could go on. I've been struggling with this for three nights and I'm getting desperate.

There are three other laptops (one Mac, two Windows PCs) connecting to the router without any problems. Strangely enough, the laptop only has this problem with the new Linksys router. It can connect to Internet via our old Airport Express wifi router without any problems. It can also connect to Internet via the Linksys router with an ethernet cable.

One thing I have discovered is that rebooting the laptop in a safe mode with network enabled FIXES THE PROBLEM! However, when I boot back to the normal mode (even when disabling all startup items and all services, except for those needed for networking), the problem is back.

Any ideas?

Thank you,

My System SpecsSystem Spec

25 Jan 2012   #2

Windows 8 Core X64

Is Windows managing your wireless network or some other app? I would suggest changing to let Windows manage it. Not sure how you do this but there should be an option in program that is controlling the wireless.
My System SpecsSystem Spec
26 Jan 2012   #3

Windows 7 Professional

The wireless networks are managed directly by Windows. There's no other app for this.
My System SpecsSystem Spec

26 Jan 2012   #4

Windows 7 Ultimate SP1 64-Bit

If everything works in safe mode, chances are it's a driver problem.

Check the Linksys website for any driver updates or firmware updates.

Linksys E3000

Failing that, it is possible there is a problem with the Linksys router. Have you considered asking for a replacement while it's under warranty?
My System SpecsSystem Spec
26 Jan 2012   #5

Windows 7 Professional

I'm pretty sure the problem is not in the router, or at least not in this particular piece. I experienced exactly the same trouble with Linksys E2000 which I returned last week. (The two routers are very similar in many ways.)

I too think it might have to do with the wireless adapter driver, but I have already tried reinstalling it (after an attempt to update it and Windows claiming it's up to date), which didn't help. There's no driver available from the Linksys website, which however does not surprise me. I mean, it would be ridiculous if a wireless router required specific drivers for connecting network adapters. Not that I know much about wi-fi, but I assume the communication protocol must be standardized pretty well. I can't imagine a restaurant with a wi-fi which would distribute to its guests CDs with drivers for wireless adapters, so that they could connect.

Thanks for your responses, guys, anyway.

My System SpecsSystem Spec
26 Jan 2012   #6

Windows 8 Core X64

You don't need a Linksys driver, you need a driver for the laptop. What is the make and full model number?
Have you checked their web site for an updated driver?
Have you checked the wireless NIC manufacturer's web site for an updated driver?

Use Piriform Speccy to see what make and model the wireless NIC is as well as other network info.

In Speccy, click on Network at lower left. Post everything down to Adapters list. For instance, mine looks like this:
You are connected to the internet
Connected through Broadcom NetXtreme 57xx Gigabit Controller
IP Address
Subnet mask
Gateway server
Preferred DNS server
DHCP Enabled
DHCP server
External IP Address
Adapter Type Ethernet
NetBIOS over TCP/IP Enabled via DHCP
NETBIOS Node Type Hybrid node
Link Speed 0 kbps
Computer Name
NetBIOS Name DELL-P370
DNS Name Dell-P370
Domain Name DELL-P370
Remote Desktop
State Active
Domain Dell-P370
WinInet Info
LAN Connection
Local system uses a local area network to connect to the Internet
Local system has RAS to connect to the Internet
Wi-Fi Info
Wi-Fi not enabled
WinHTTPSessionProxyType No proxy
Session Proxy
Session Proxy Bypass
Connect Retries 5
Connect Timeout 60000
HTTP Version HTTP 1.1
Max Connects Per 1.0 Servers INFINITE
Max Connects Per Servers INFINITE
Max HTTP automatic redirects 10
Max HTTP status continue 10
Send Timeout 30000
IEProxy Auto Detect No
IEProxy Auto Config
IEProxy Bypass
Default Proxy Config Access Type No proxy
Default Config Proxy
Default Config Proxy Bypass
Sharing and Discovery
Network Discovery Enabled
File and Printer Sharing Enabled
Media Sharing Enabled
Adapters List
Broadcom NetXtreme 57xx Gigabit Controller
IP Address
Subnet mask
Gateway server
Use the mouse to select the data you want to post. If you can't see all of it, continue to hold the left mouse button down and use the down arrow to reveal more of the Speccy window. That allows you to copy data that is below the bottom of the window.
My System SpecsSystem Spec
03 Mar 2012   #7

Is your problem solved?

I am facing exact same problem with HP ProBook 4330s. Is your problem resolved? I am looking for a solution desparately. Its been more than one week that I am facing this isse.
My System SpecsSystem Spec

 Wireless Internet connection lost after a few seconds

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