Here is a guide on How to Fix No Internet Connection Windows 7 when its boot up. I received an old PC (Intel i7 920 + Gigabyte EX58-UD5 + 3GB RAM) few days ago which was built around 2009. After playing with it, I discovered that it has a few issues and one of it was the internet connection.
Every time I started up the rig, Windows Network Adapter is not able to detect any internet connection even though my router is turned on and LAN Ethernet Cable is connected to the PC. As this gigabyte motherboard has 2 ethernet ports, I switched the LAN cable from 1 to the other. From that quick fix, Windows was able to auto-detect my Internet Connection. However, it is a hassle to kept on plug in and out the Ethernet cable each time I turned on the PC.
I wonder whether the issue was due to Network Adapter Driver. Previously I had issues with my Gigabyte Gaming Keyboard Aivia K8100 where some buttons were unresponsive but was fixed by reinstalling the drivers. Perhaps this undetectable internet connection upon start up could be fixed easily by reinstalling the drivers! I went on to the START MENU > RUN > TYPE : “Device Manager” > EXPAND : Network Adapters > Right-click each network adapter driver I found and click Uninstall > Plug out and in the Ethernet Cable > Restarted PC. Still, it does not work.
After putting some thought, I tried installing the latest Windows Network Adapter for my Gigabyte motherboard via Windows Update. I checked all the updates and click OK. Windows downloaded and installed all the essential drivers and hot-fixes/patch and restarts my PC. This process has finally resolved my issue! Windows was able to detect Internet from my router.
However, the joy is short-lived. When I installed another Windows Update, all of a sudden, Windows Network Adapter is acting up again and refuse to detect my Router’s Internet Connection! Googling around for the related caused of it has led me to a software called Bonjour. It is a software to provide a general method to discover services on a local area network. After I remove the software, Internet Connection is detectable by Windows Network Adapter again. Yippee! Tested by performing a few restart/shutdown and installing new Windows update to confirm its a permanent and yes it was.
Before performing the steps below on removing bonjour, take note that you must have administrator privileges before executing these commands. Also a warning, iTunes and some other programs need Bonjour to function. Removing this software would end up preventing other dependent software from functioning properly. For me, I just deleted it since I just wanted Internet access on that PC.
Steps that I completely uninstall and remove Bonjour:
Here’s how to safely uninstall and remove the Bonjour service and files (mDNSResponder.exe and mdnsNSP.dll). Just follow the few simple steps below to remove Bonjour from your computer.
1. Go to [Start > Run].
2. Copy-paste the command below and hit OK. Replace the double qoutes by manually retyping it.
2. “C:\Program Files (x86)\Bonjour\mDNSResponder.exe” -remove
3. Go to [Start > Run] again and type the following command and hit OK.
3. regsvr32 /u “C:\Program Files (x86)\Bonjour\mdnsNSP.dll”
4. After you restart, you can safely delete the Bonjour folder without errors.
4. Delete Bonjour folder located in “C:\Program Files (x86)\Bonjour”
To know if you have actually uninstalled Bonjour. Open services.msc via (START MENU > RUN) and see if there is a service similar to: ##Id_String2.6844F930_1628_4223_B5CC_5BB94B879762##”. If it is not there, then it has been uninstalled.