Browsers sometimes not loading google pages

Have 2 different computers connected to the same network.

Sometimes when I try to load any type of google related page, it gives me the "unable to load page" message after a long loading wait. After about 20mins to a half hour google pages become accessible again and work normally. It just keeps recurring intermittently for no apparent reason. All other sites are accessible when google pages are down.

Get the problem on all browsers (Firefox, Chrome and IE) and on both computers (1x PC 1x Dell notebook).

Router is a telstra bigpond router.

Please help! been having this issue for months now and it is driving me crazy!
 
Back