Windows – Issue with Cisco WebEx: “atinst.exe – Entry Point Not Found”

webexwindows 8.1

For some reason Cisco WebEx client stopped working on my Windows 8.1 Pro x64 machine and it looks as follows whenever I attempt to join the meeting:

enter image description here

So it just freeze on 10% and error message says:

atinst.exe – Entry Point Not Found

The procedure entry point _itoa_s could not be located in the dynamic
link library C:\Windows\SYSTEM32\combase.dll

The library mentioned in error message exists in C:\Windows\System32 and has the following version:

enter image description here

I tried to reinstall the client more than once as well as clean WebEx folders in %AppData% locations, but this did not work. The only way I can join the WebEx meeting now is if I download the meeting file and join the meeting using it. The only prior change which I can possibly link to this problem is removal some old version of Java (I now have Java 8 update 51 x64 and x32 installed) but not sure if it is related with this WebEx issue.

Any ideas how to fix this?

Best Answer

The _itoa_s function (Convert an integer to a string) is located in the MSVCRT.dll and not combase.dll.

Looks like our tool doesn't support the secure CRT and Windows 8.1 correctly. Make sure you use the latest version. Also run sfc /scannow or DISM /Online /Cleanup-Image /RestoreHealth to detect corrupted Windows files.