Windows 7 and loss of Internet connection

I don't know what you are using to assign addresses, so I am assuming it is a router of some sort. You will need to go to the manufacturers site, look at the manual and find out how to limit the DHCP address scope. I changed mine to limit the assigning of DHCP addresses to 192.168.1.200 through 192.168.1.250. Your router may use the 10. subnet, so your addresses may be different, depends on the router manufacturer, or if you use a DHCP server, the scope set with the DHCP server. That gives me 50 IP addresses for any guests that may want to use wired or wireless connections, and should be more than enough. This allows me to assign 192.168.1.1 through 192.168.1.199 to a device and not have to worry about the DHCP server trying to use one that is assigned permanently to a device (Printer, switch, PC, Server, Virtual Server, etc).

Once you have that setup in your router, you will now need to assign a static ip to your PC. This is all done from the network adapter.

From the start menu:

Control Panel

Network and Internet

Network and Sharing Center

On the right hand pane of Network and Sharing Center

Change adapter settings

Double Click your network adapter

Select the "Details" radio button

Write down the following lines:

Connection Specific DNS (May or may not exist, depends on provider)

IPv4 Subnet

IPv4 Default Gateway

IPv4 DNS Servers

Once you have written those down, you can close that box.

You should be back at the "Local Area Connection Status" box.

Choose the "Properties" radio button.

Select the "Internet Protocol version 4 (TCP/IPv4)", which will be in a blue box when selected. 

Now select the "Properties" radio button

The "Internet Protocol version 4 (TCP/IPv4) Properties" box should have popped up. If so:

Select the following:

"Use the following IP address"

In the IP address box, enter an IP address. Example: 192.168.1.20

Press the tab, the subnet should fill in automatically, if not, enter the value from "IPv4 Subnet" you wrote down from the above step. Examp,e: 255.255.255.0

In the dafult gateway, enter the value from the steps above. Example: 192.168.1.254

Now to move on to the next 2 boxes, DNS Servers. You may have only 1 DNS server entry from the DNS entry you wrote down from above.

Enter the DNS servers you notes above.

If there was "Connection Specific DNS" entry or entries, do the following (If not skip the "Connection Specific DNS" sections:

Select the "Advanced" radio button.

The "Additional TCP/IP Settings" windows should open

Select the "DNS" tab

If there is more than 1 "Connection Specific DNS" entry, do the following:

Select the "Append DNS suffixes (in order):"

Select "Add..."

In the "Domain suffix", enter the first Connection Specific DNS entry.

Select the "Add" radio button.

Add all the DNS Specific suffixes you wrote down. You can only enter one at a time.

When finished sleect the "OK" radio button

If you only have 1 entry in "Connection Specific DNS":

In the box labeled "DNS suffix for this connection", type in the entry you noted above for the "Connection Specific DNS".

When finished sleect the "OK" radio button

Check the "validate settings upon exit" box.

Select the "OK" radio button.

Select the "Close" radio button

You should see the 'Windows Network Diagnostics" open, and check for any problems. Hopefully all is well and it states "Troubleshooting could not identify the problem", and choose "Close the Troubleshooter".

Close any additional boxes or pop-ups that are open, and check and make sure allis connecting. If not, go back and verify any steps. the most common are the IP addresses and gateways.

Good luck. Post back if it resolves the issue.