May 28, 201511 yr Yes, it's important to find out which specific DLL or process is being managed by rundll32.exe, as it would be that DLL causing the problem - not rundll32.exe itself. Understood! I'll give it a go and I'll report back here with the results!
May 28, 201511 yr Remember FSX isn't the only process that needs rundlll32.exe. If you want risk to crashing your system then by all means remove runddll32.exe! Gerry Howard
May 28, 201511 yr Remember FSX isn't the only process that needs rundlll32.exe. If you want risk to crashing your system then by all means remove runddll32.exe! Sure, but in the last 6-7 flights, everything went completely flawlessly. I'd like to know the reason behind that issue. But for now, shutting it down on every flight sim session, is an acceptable workaround for me.
May 28, 201511 yr Agree with mgh, you need to get to the bottom of that as you have a serious problem somewhere Chris Smith
May 28, 201511 yr Does the screenshot of the Process Explorer give any hint to someone with more knowledge about these system files / processes than I have? As far as I understand it, the ntdll.dll does seem to eat up all this CPU power. But this dll is used by a lot of programs and processes, right? What really surprises me, is that ending the rundll32.exe doesn't have any negative consequences.
May 28, 201511 yr rundll32.exe should not use 24.56% of CPU consistently. My systems shows it doesn't use any CPU with FSX running.Thread 6808 shows that something is wrong. It shows several calls for _misaligned_access and also MsiInvalidateFeaturecache - possibly in running a loop? Rundll performs the following steps: It parses the command line. It loads the specified DLL via LoadLibrary(). It obtains the address of the <entrypoint> function via GetProcAddress(). It calls the <entrypoint> function, passing the command line tail which is the <optional arguments>. When the <entrypoint> function returns, Rundll.exe unloads the DLL and exits. https://support.microsoft.com/en-us/kb/164787 That suggests that the problem is not with rundll32.exe but with the .dll it is trying ro run. Gerry Howard
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