The file is a library that almost all PCs have. The quick-start installer does cope with machines that don’t have one, but in your case it looks like the installation has not been successful and has left the system in an unusual state. You can download a version of the file and install it, which should remove this problem and allow you to uninstall. Otherwise the EDQ quick-start installation is mostly just a set of files in Program Files and in Program Data, and a handful of registry keys.
thanks for reply.
So to sort my mess out.
i had to get a zip of someone else default install (thanks Robert at Oracle Support). This meant I could run the uninstall and then the java elements, see https://support.oracle.com/epmos/faces/DocumentDisplay?_afrLoop=536030432269736&id=1384937.1&_afrWindowMode=0&_adf.ctrl-…, (make sure you pick the right java version under the EDQ install) to force out some registry stuff.
Then deleted the EDQ install and also the EDQ data under ..ProgramData on windows (this was hidden but stops the install if it's there)
and voila it's all installed again.