I have recently had massive volumes of data downloaded without me being on-line. I know that one does not have to be at one's machine for downloads to happen, but my problem seems different. I have been unable to find any users stealing bandwidth (though that POSSIBILITY still exists). Have run several virus/trojan/etc programs and no threats found. BUT what I have found is that if I open internet sites separately, my router does its usual handshaking for a few seconds. Quite normal. However, if I USE TABBED browsing to get to the homepages of the same sites, the W/LAN light goes on flashing and simply will not stop until I have closed down all but one of the sites. I have done this about a dozen times and I get the same result. Could tabbed browsing be responsible in some way?Tabbed browsing is a feature that enables you to open multiple websites in a single browser window. If multiple websites are loading, regardless of "homepages of the same sites", they will still eat large bandwidth usage that might cause your W/LAN light goes on flashing.Thanks again gh. What I didn't make clear in my first post was that the flashing goes on "for ever" - even when all the 4 sites that I have tabbed have finished opening their homepages. When I say "for ever" I mean hours and hours. It only stops when I have closed all but one of the sites' homepages.
Last week, while I was discovering this problem, my bandwidth USED in one 24 hour session was just short of 1 GB. And I was not even using my computer! It stopped when I closed the 4 sites, but the whole thing starts over when I go back into the sites via tabbed browsing. I've looked at the task manager, and there are no "strange" users.
I must admit that now I know how to stop it happening it becomes more of a curiosity than a danger, as I am uncapped, but it still worries me. Can you post the URL of the website you are having trouble? Quote from: Phil-Logan on May 18, 2012, 08:14:16 AM

Thanks again gh. What I didn't make clear in my first post was that the flashing goes on "for ever" - even when all the 4 sites that I have tabbed have finished opening their homepages. When I say "for ever" I mean hours and hours. It only stops when I have closed all but one of the sites' homepages.
Last week, while I was discovering this problem, my bandwidth used in one 24 hour session was just short of 1 GB. And I was not even using my computer! It stopped when I closed the 4 sites, but the whole thing starts over when I go back into the sites via tabbed browsing. I've looked at the task manager, and there are no "strange" users.
I must admit that now I know how to stop it happening it becomes more of a curiosity than a danger, as I am uncapped, but it still worries me.

Please feel free to ignore the above post.

Please feel free to ignore the above post.

Curious as well, seems like valid points (?)