The procedure entry point_except_handler4_common could not be located in the dynamic link library msvcrt.dll
This error is caused by a 3rd party utility or applcation overwriting your msvcrt.dll with a different version.
For example if a windows vista version of this DLL was copied on to a windows XP computer you would probably get this error.
A solution to this problem can be found in Microsofts KB
http://support.microsoft.com/kb/324762
[Edit] Charles Koontz solution seems to be helping a lot of people as well.
Charles Koontz
If the problem appears after installing or upgrading the Mozilla Firefox browser to version 3.5 (or later) operating under Windows XP, the problem is due to a Windows Vista driver (dwmapi.dll) installed in a Windows XP OS at folder system32 by mistake (faulty install program).Delete that dwmapi.dll file to fix the problem.
Thanks to users of the Mozilla Firefox support site.

dear mr. charles koontz,
nothing but .. u’re da maaaaaaaaaaaaaaaaaaaaaaaaaan!!!!!
thank you so much!!!!
CHARLES THANK YOU FOR YOUR HELP IM FROM PHILIPPINES THANK YOU SO MUCH IT REALLY WORKS…
10x so much
Thanks !
Now it works fine.
thank you for help Charles.
thank you for helping me charles, i am from romania, i think you helped people from entire world. good work, and thank you again.
Thank you very much Charles!!!
Your solution worked perfectly for my Win XP system!
Much appreciated!
Thanks for the help Charles. Worked a treat.
Ken from Australia.
sir Charles Koontz
i thank you for the help you really saved the day!! thanks so much!! ^_^
Charles,
thank you so much I just tried it a minute ago. It worked. You’re the man!
yeep this is a very good solution but i dont think so that it will recovery the error, i suggest here to all buddies to install window XP latest version and register it from Microsoft Word , this is the proper solution.. if any body ask any kind of solution plz submit via this site, i will reply my best… God bless you all.. bye till my next message .. love you all my fans… SAM (Zirector Zip Productions)
I am using Windows xp Professional,when i want to install my audio drivers it says “The procedure entry point_except_handler4_common could not be located in the dynamic link library msvcrt.dll.” And when i press ok, another message pops up “RUNDLL Error loading streamci The specified procedure could not be found. IDK WHAT TO DO
((( Help me please..
Thanks Charles Koontz…..
“If the problem appears after installing or upgrading the Mozilla Firefox browser to version 3.5 (or later) operating under Windows XP, the problem is due to a Windows Vista driver (dwmapi.dll) installed in a Windows XP OS at folder system32 by mistake (faulty install program).
Delete that dwmapi.dll file to fix the problem.”
It’s works for me thanks….
Thanks a million! True (annoying) lifesaver! You area scholar & a gentleman! THIS WORKS FOR XP PEOPLE!
Thank u Thank u Thank u Thank u Thank u Thank u Thank u Thank u
This helps me a lot
Once again thanks
Thank You Mr. Charles Koontz……Thank You very much!!!!
THANX SO MUCH CHARLES KOONTZ.. idam from indon..
fantastic
Thanks it really worked……:)