I updated Adobe Acrobat DC from version 19.10.20100.325521 to 19.12.20035.332343 on Windows 7 SP1 x64 Ultimate, and I see that I lost 467.628032 MB in the process. Since the update seems minor, I assume that most of the lost space comes from update temporary files. The update was done through Adobe Acrobat DC -> Help -> Check for updates.
Where are Adobe Acrobat DC update temporary files located?
I unsuccessfully tried (the update was done on 2019-07-14 at around 8 PM):
C:\Users\[username]\AppData\Local\Temp\
C:\Windows\Installer
I searched for
AcrobatDCUpd1901220035.msp
since that the filename of the update I see on https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/continuous/dccontinuousmay2019qfe.html#dccontinuousmaytwentynineteenqfe (mirror).