New quad core duo pc w/XP Pro & 4 Gb RAM.
Cable connection routinely sees 7 MB downstream, 650 KB upstream.
Since beginning, have experienced sudden stops with IE7; also happens w/Maxthon overlay & w/Firefox 3. Unpredictably, w/no obvious trigger, browser simply stops connecting. If Outlook is open, it usually gets stuck too, unable to send/receive.
Nothing else on pc hangs up. If I close browser & reopen, it works fine...for awhile, then repeats. Ditto Outlook. Seems to happen sooner if more browser tabs open, but eventually happens even w/1 or 2 tabs. Definitely happens more if Outlook open; on closing Outlook, browser sometimes starts working again.
Reboot of router, modem & pc have no effect.
Old system used exact same modem/router config. No other changes.