At my office we've got 2 Dell XPS M1530 laptops. Both have been running up to date installations of Windows 7 with NOD 32 Anti Virus for months now with no problems. Last week however both started freezing with "Not responding" issues every few minutes when browsing the web. It doesn't matter which browser, the latest versions of Firefox, Chrome and IE8 all do the same. After a few minutes the browser "wakes up again" but freezes again very soon. I suspect it's an OS update issue, a driver/OS conflict or something. Anybody got a solution for this?