I don't think this is a bug, but an unwanted functionality.

As for Windows - it has accumulated files in TEMP always. It is even worse than that, since System has its own temp and every user their own temp. Many applications write important temporary files in System temp. If you look at a careless end user computer they may have 10 000+ files in TEMP and complain about sluggish performance. Some people even store their own files there.

This is of course just horrible since early UNIX perspective, when temp is cleaned in every boot. If you would clean all the Windows temp files in reboot, I think that would cause law suites for disappearing user files. Like in many other cases, Windows bad functionality has become the surreal reality.

But of course VMware could do it for its own files, if they would want to.