Error 1606

I have a windows 98SE based computer. After trying to install a registered program AutoCad 2002 from my H.D. (located in c:\AutoCad2002\AutoCad2002) I got an error message:
“Error 1606: could not access network location C:\AutoCad2002\AutoCad2002”.Ever since then when trying to install the same program from the CDrom I get the same error message. I have a PC base not networked.
Question: where is the windows installer.exe, how can I edit it or delete/replace it or anything.