Since Friday morning my HP laptop (has windows 7 home premium) can't open any websites. It shows the internet connected on the network (on IPV4). I have rebooted, restarted modem. released and renewed IPconfig, disabled bonjour, to no avail. Ran multiple diagnostics, one of them said "One or more network protocols are missing."
The other part of the problem is when connected through ethernet directly to modem, laptop tells it is unidentified network, the diagnostic identified error as " local area connection does not have a valid IP configuartion."
I would suggest you to follow the steps mentioned below.
Step 1: Disable the IP Helper service
a. Hold the Windows key and type R, enter "services.msc" (without the quotes) and press Enter
b. Scroll down to the IP Helper service, right click on it and select Properties
c. In the dropdown box that says "Automatic" or "Manual", set it to Disabled and then click on "Apply"
d. Then click on "Stop" to stop the service from running in the current session
e. Click OK to exit the dialog
Step 2: Disable IPv6
Try uninstalling IPv6 on all interfaces, removing any IPv6 virtual adapters, and resetting the TCP/IP stack. To remove IPv6, go into the properties for each network adapter and either uncheck the box next to the protocol "Internet Protocol version 6 (TCP/IPv6), that will disable it, or select it and click uninstall, which will remove it off the computer. Then go into device manager and remove any 4to6 adapters, WUN miniport adapters, or tunnel adapters.
NOTE: You should do this for each network connection.
Step 3: Disable the DHCP Broadcast Flag
Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Windows 7 cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers
To resolve this issue, disable the DHCP BROADCAST flag. To do this, follow these steps:
a. Click Start, type "regedit" in the Start Search box and then click "regedit" in the Programs list.
If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
b. Locate and then click the following registry subkey:
c. In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
d. On the Edit menu, point to New, and then click DWORD (32-bit) Value.
e In the New Value #1 box, type "DhcpConnEnableBcastFlagToggle" and then press ENTER.
f. Right-click "DhcpConnEnableBcastFlagToggle" and then click Modify.
g. In the Value data box, type 1 and then click OK.
h. Close Registry Editor.
By setting this registry key to 1, Windows 7 will first try to obtain an IP address by using the BROADCAST flag in DHCP Discover packets. If that fails, it will try to obtain an IP address without using the BROADCAST flag in DHCP Discover packets.
the sfc /scannow gives this message "Windows resource protection did not find any integrity violations."
CCX Diagnostic utility in windows 7 that runs the network diagnostic tests ran following tests and all were passed
1. Driver installation test
2. Card insertion test
3. Card enable test
4. Association test
5. Authentication test
6. network test
Adapter is Atheros AR9285 802.11b/g/n wifi adapter
laptop is windows 7 HP G62 notebook pc AMD Phenom (tm) II N850 Triple core processor 2.20 GHz 4 GB 64 bit operating system.
I also ran cmd (admin) Netsh int ip reset resetlog.txt and reboot to no effect