Can you see any errors in internet browser?

its written
This webpage is not available
and i have installed a new windows yesterday same is the case i think the issue is with the router

When i removed my router passwork now its opening every website now its unsercured network but when i make it a secured network by applying password it wont connect

Do you have latest firmware on the router?

make it a secured network by applying password it wont connect

Very strange accident with this security key.

yes i have downloaded the latest firmware
today morning i connected to my router by making it unsecured network and then i made it secured again and then by magic everything was solved i dont know the root cause of this problem this is the second time this has happened to my router and the target is only gmail website
but its interesting from last week i have read so many topics related to routers and Jimasek you are really very helpfull hope i dont get this problem again :) if i did i will ask u again for your help
thanks for your Help

Again the same problem now its worse now on the unsecured network its not connecting to gmail and yahoo website but when i connect to lan cable every thing connects what should i do

If you try "ping gmail.com"
Then what happens?

With wifi its says this webpage is not available but when i connect lan cable it works perfectly

ping 173.194.65.83 under wifi connection what is the response?

Hello Soma thanks so much when i ping 173.194.65.83 google website opened and also gmail and yahoo opened thanks so much for solving my problem but i cannot understand why is this happening and what does this ping do