>>When doing a quiet install with all the necessary parameters, the SQL Server 2014 installation now comes up with a user dialog to choose the path where to extract the files to. This is extremely annoying and kind of defeats the purpose of a quiet install.
>>Somebody knows about a workaround for this? I tried the mysterious /X flag but that does not have any influence on it.
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>Actually, the previous behavior of extracting mysteriously into an unknown folder and then deleting it (or not, depending on success) was even more annoying, because it's basically a .msi which has to remain on your machine, uncompressed, pretty much forever. If not, you can't install other components and can't even uninstall, because the .msi is designed so that it doesn't keep the list of shared components in the target folder, no, it's in the source folder only. Once it's gone, it doesn't know how to uninstall.
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>Add to the confusion the fact that anything Microsoft by default goes to c: drive, which will then inevitably become cluttered and you will sooner or later start deleting things from the temp folder, and guess what - the invisible default location to extract was beneath it. So the installation you didn't know of was sitting there for a few years until you ran out of space, then you deleted stuff from temp, then decided you wanted to install the newer SQL and, oops, you can't uninstall the old one because the install folder is gone.
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>So this minor annoyance is actually an improvement, no matter how small. Take it and direct it to extract to anywhere you got room, just not C:.

That is true, I deleted lots of annoying folders on C:. Sometimes it chose to extract the files to a removable disk if there was not much space on C: and then later you got rid of that disk...

I found a workaround that when you install the same SQL Version again it creates a new folder on C: with the extract files, and then you can use that new folder to direct an uninstall that searches for the removed files, in order to successfully uninstall an older installation.