Bug or system problem

I just updated 7-zip to 4.65 Rev. 2 and in the midst of the installation process, I got this error pop-up:

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7-Zip Portable | PortableApps.com Installer
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Error opening file for writing: F:\PortableApps\7-ZipPortable\App\7-Zip\7-zip.dll Click Abort to stop the installation, Retry to try again, or Ignore to skip this file.
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Abort Retry Ignore
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Is this a 7-zip bug or a Wins problem? I haven't seen it mentioned yet, IDK if anyone else has encountered it. Also downloaded it again, same thing with another copy. This was an update, not a fresh install, if that matters.

Edit: Fresh install solves this issue.