Devices: Source computer (Windows XP SP3 & THOMSON ST585 router), Laptop (Windows 7 Home Premium)
I've been using a wireless connection to use the internet on my laptop for a long time. The source is a THOMSON ST585 router. Today, the connection was ok, but it said "No internet access", and no web browsing was possible. After a lot of troubleshooting, where Windows 7 troubleshooting concluded there was a problem in internet access, but not the wireless connection, I changed the DNS setting from "Obtain DNS server automatically" to "Use the following DNS servers" and entered the DNS values that the router uses. Afterwards, internet access became available.
This is confusing me. How has it been working well all that time without the need for entering the DNS numbers and why has this changed now?