just trying again with reinstall of the ms link. will keep you posted - all updates done to os, xeon x5355 on intel s5000vxn mobo with 8gb ram (I know!) and nvidia 570gtx card, and raid 10 with 4 hdd. will report back as soon as I've tried.
[edit] still same error code with reinstallation and yeah win 7 x64 pro