http://www.experts-exchange.com/Oper..._21141745.html?
http://forums.viaarena.com/messagevi...&enterthread=y?
It seems there are a lot of problems reported with some NTDLL.dll versions... I hope that some of these will help you, unfortunately (?? not so nfortunately :) ) I never had problem with this, so I don't know if my answers will help you..
Do you have Norton antivirus installed and Scripting Protection enabled?
Good luck