My program named XXX.exe use web browser with AxSHDocVw and SHDocVw. By the way, my another program perform twenty process named XXX.exe at the same time. As XXX.exe has web browser, sometimes process is killed by OS (Windows 2003 Server), showing the message like title. (XXX.exe has encountered a problem and needs to close) I think the cause come from wininet.dll. I've got a dump file and message. You can see that below. ------------------------------------------------------------------------------------------------------------------ Server=watson.microsoft.com UI LCID=1042 Flags=1672016 Brand=WINDOWS TitleName=SIGADKWORKER.EXE DigPidRegPath=HKLM\Software\Microsoft\Windows NT\CurrentVersion \DigitalProductId HeaderText=XXX.exe has encountered a problem and needs to close Stage1URL=/StageOne/SIGADKWorker_exe/1_1_2827_19541/wininet_dll/ 6_0_3790_4098/000319d3.htm Stage2URL=/dw/stagetwo.asp? szAppName=SIGADKWorker.exe&szAppVer=1.1.2827.19541&szModName=wininet.dll&szModVer=6.0.3790.4098&offset=000319d3 DataFiles=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \WER2e11.dir00\SIGADKWorker.exe.mdmp|C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \WER2e11.dir00\appcompat.txt Heap=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \WER2e11.dir00\SIGADKWorker.exe.hdmp ErrorSubPath=SIGADKWorker.exe\1.1.2827.19541\wininet.dll \6.0.3790.4098\000319d3 DirectoryDelete=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\WER2e11.dir00 -------------------------------------------------------------------------------------------------------------------- Even if I did the debugging with that dump file, I couldn't find the position of source code, having pdb files. I assume the postion of source code is unsafe. you can see some stacks below. -------------------------------------------------------------------------------------------------------------------- ExecuteWorkItem+21h (77E84C15h) @RtlActivateActivationContextUnsafeFast@8 (7C968B9Ch) _RtlpWorkerCallout@16 (7C97A7C1h) -------------------------------------------------------------------------------------------------------------------- I'm asking you have any idea that problem doesn't occur. Thank you for reading all of this.