I have simular problem on two different computers. When trying to start some powerpoint documents and on a other computer different word documents the application crashes. Event id:1000 Source: Microsoft Office 10 "Faulting application powerpnt.exe, version 10.0.4205.0, faulting module ntdll.dll, version 5.1.2600.2180, fault address 0x00010f29." Have tried to start the documents on several other computers without any problem. Both office XP and 2003 installed on Windows XP. Have anyone any solution on this problem. Have tried to search on the internet and forum and haven't found any good solution. Seems that ntdll.dll is involved in other problem also.