This may help.
Rundll - This program has performed an illegal operation and will be shut down
When you click the Details button it reveals a message similar to one of these:
RUNDLL32 caused a General Protection Fault in module MMSYSTEM.DLL
RUNDLL caused a General Protection Fault in module MMSYSTEM.DLL at 000a:00000032 This problem can occur if the drivers=mmsystem.dll line is missing from the [boot] section of the System.ini file.
To correct this problem:
Use a text editor (such as Notepad) to edit the System.ini file (this file is found in \Windows) Add the following line to the [boot] section of the file: drivers=mmsystem.dll
Save, and then close the System.ini file Restart your computer
double click your C drive in My Computer, then your Windows folder. Scroll down past the folders and through the files until you reach SYSTEM.INI. It will look like a notepad, and that's what it is.
Double click it, and the first line of the text you'll see is [BOOT].
At the foot of that section, but before the next entry in squared brackets, enter: drivers=mmsystem.dll
Then ensure you leave a space to the next squared bracket entry, which is probably [KEYBOARD].
Part of the result will probably look like this excerpt (but without the spaces, which I have to include to keep the format).