I downloaded the Contribute 3.11 from Macromedia website and then I ran
Contribute 3.11 Installer. The error occurred with the message "The system
cannot find the path specified." (title bar showed "C:\WINDOWS\Downloaded
Installations\Macromedia Contribute 3.11\CT_3.0.1_PatchPackage.msp") and an OK
button. After I clicked "OK", another error appeared "CT_Client_Installer.exe"
with the title bar showed "Error Executing the Specified Program". Another
error is "Unable to execute the specified command line!".

Is there a way to fix this?

Thank you.