Starting last week, anytime I have DL.com open on my computer (using Chrome, whatever auto-update version it is on), everything slows to a crawl. Mouse pointer lags so much, it take almost a full minute just to line it up to close the tab.

If I do not DL.com loaded on a tab, all is well. The minute I load it up, even if it's the only tab open, it feels like I'm running an old 486 CPU.