Hi MichaelScully,
1. What is the exact error message you are getting while you try to connect to a website?
2. Have you made any changes to your computer perviously?
3. Are you facing this issue with all the website or with any specific website?
- Was it working fine earlier?
5. Is all the Computer is connected to the same router?
I would suggest you to contact your Internet Service Provider to check DNS settings, and try to assign it manually and check if it helps.
Hope this helps.