How does the computer connect to Internet, via DSL or Router?
If the machine is connected via Wireless or router, I suggest you bypass the router and connect to cable modem directly for a test. Then, please refer to the following steps to obtain IP address automatically.
1. Configure the connection to obtain an IP address automatically
a. Click "Start", input "NCPA.CPL" (without quotation marks) to Start Search bar and press "Enter".
b. Right-click the network connection and click "Properties".
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
c. Click to highlight "Internet Protocol Version 6 (TCP/IPv6)" and click "Properties".
d. Check "Obtain an IP address automatically" and "Obtain DNS server address automatically".
e. Click "OK".
f. Click to highlight "Internet Protocol Version 4 (TCP/IPv4)" and click "Properties".
g. Check "Obtain an IP address automatically" and "Obtain DNS server address automatically".
h. Click "OK".
i. Reboot the computer.
However, if the issue persists, please move on the next steps.
1. Temporarily turn off firewall on the machine and router (If it has one).
2. Upgrade the NIC driver.
3. Restart the computer to Safe Mode with Networking to check the result.