People keep asking why the WinSxS directory uses so much space. And how they can shrink it.
We advise you not to meddle with it manually. Here is some background material:
Blog article by the Windows Servicing Guy, who says not to mess with WinSxS manually ... and why.
TheWindowsClub explains WinSxS (be sure to read the whole article).
This e7 blog article talks about how WinSxS takes up less space than it looks like.
Win8.1 and later can now tell you the exact size of WinSxS
Windows Servicing Guy says your Windows partition should be at least 40GB in size. And why.
And here are the recommended ways to reclaim space in WinSxS:
Analyzing WinSxS on Win10 with dism.exe