Hello and welcome . Try this please : DNS Resolver Cache
This will reset the DNS.. post back results please.

Originally Posted by nmrm

I think that fixed it.
Did lots of reboots and shutdowns and got internet all the times.

By the way, what DNS has to do with DHCP client getting an IP address?
Don't know if it's of any interest but I'm sure the problem occurred right after I set the DNS resolver IP addresses to fixed IP addresses in the Local Area connection IPv4 properties.

Kind regards,
Nuno Magalhães.

DNS doesn't really have anything to do with DHCP. DNS is responsible for converting hostnames to IP addresses. DHCP is used to assign dynamic IP addresses, and their corresponding subnet masks, to computers running TCP/IP within it's network.

How is your router DHCP configured? Could you take a few screenshots of the router page for us please?

Tom

I've attached a batch file that will reset your internet connection, reset your hosts file and flush your DNS. Could you please download it and run it?

Hopefully this should fix your connectivity problems, if not, we'll have to dig deeper.

Tom

Originally Posted by nmrm

No. That didn't work either. This morning... no internet at startup.
Any other suggestions?

Kind regards,
Nuno Magalhães.

Originally Posted by nmrm

Hello again,

I noticed an article from microsoft site (Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers) that it states the following:
1) I have to set DhcpConnEnableBcastFlagToggle to 1, but as you can see I don't even have that key
2) If the router doesn't support broadcast I had to set DhcpConnForceBroadcastFlag to 0, instead of step 1

I'm attaching a screenshot without valid ip at startup and another with valid ip at startup.
How can I know if my router supports dhcp broadcast? Is there any GUI friendly way to do this?

Any help appreciated,
Kind Regards,
Nuno Magalhães.

Hello Nuno,

My apologies for the late reply, I'm right in the middle of exams at the moment and most of my time is going towards revision.

Try following the steps outlined in that tutorial to make the key. Sometimes in Windows, if you haven't changed a setting before, there won't be a registry key for it.

To resolve this issue yourself, disable the DHCP BROADCAST flag in Windows Vista. To do this, follow these steps:
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.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}
In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
On the Edit menu, point to New, and then click DWORD (32-bit) Value.
In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
In the Value data box, type 1, and then click OK.
Close Registry Editor.

Then reboot and see if you have the problem. If you still do, change the value data to 0 and reboot again.

Short of getting WireShark on it, I don't know how to check this flag on your router; and I don't even know if WireShark can show this. Is there any settings page on your router which allows you to change the DHCP settings? I would be very surprised if there isn't

Tom