im running on my laptop dell e1705 with intel dual core 2.16 ghz 2 gig ram
AE 7.0 i havent had any crahes yet. ive been running it since its release. soory to hear that youhave problems though.
you can also render out as a png file or jpeg depending on whether or not you need transparancy. go to shaveplatypus and do a search on swf and ae. i did this a bunch on