I have a windoze laptop that takes somewhat longer than 1m20s quite often. Even after the full desktop has appeared the mail washer and mail browser open and are un-usable with "application not responding, cancel or wait" dialogue box. Like yours, the task manager shows 100% disk activity and a few percent cpu. It turns out that a disk scanning app runs to a schedule and gets in the way of everything else. Machine is 8GB with Core i7 processor and is totally stuffed by the scanning. Eventually it gets over it and then it works fast enough.