Hi Daniel,
This issue may occur due to cables that aren't connected properly, corrupted or incompatible drivers, missing updates, network connection settings or network connection settings.
Method 1:
I would suggest you to run the “Internet Connection and Network Adapter troubleshooter” to diagnose the exact issue.
Follow the steps mentioned below:
a. Press “windows Key + W”.
b. Type “Troubleshooting” in the search box and hit enter.
c. Select “Network and Internet” option.
d. First select “Internet connections” troubleshooter.
e. Follow the on-screen instructions.
f. Then select “Network Adapter” troubleshooter and then follow the on-screen instructions.
Method 2:
If the issue persists, I would suggest you to disable security software temporarily and check.
Follow the steps to disable security software:
a. Search for the security software installed in your computer in the Windows 8 search option.
b. Click on Settings tab.
c. Uncheck the option to turn on security software.
d. Click on Save changes button.
e. After disabling security software, check if it helps.
Note:
1) Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.
2) Once you are done with the troubleshooting, ensure that you have checked the option Turn on security software under settings tab.
Refer to the link for additional information.
Wired and wireless network problems
Hope this information helps. Reply to the post with updated status of the issue to assist you further.