When installing Safari Beta 3.0 for Windows, you should let it install in the default location.
However, if you want to change the default location of Safari, do not install it at the root of the C drive, or "C:\\" . Doing so may cause issues in Safari.
This document will be updated as more information becomes available.
Important: Safari Public Beta is preview software licensed for use on a trial basis for a limited time. Do not use Safari Public Beta in a commercial operating environment or with important data. You should back up all of your data before installing this software and regularly back up data while using the software. Your rights to use Safari Public Beta are subject to acceptance of the terms of the software license agreement that accompanies the software.
Important: Apple does not provide technical phone support or fee-based support agreements for using Safari Beta 3.0 for Windows. Support is available on Apple's website.