I've read all about WinSXS (Side by Side) and how it tries to solve the DLL Hell problems that have plagued Windows for ages, but I thought it was ridiculous that this folder was taking up over 10 gigs of precious space on my 64 GB solid state drive. A few months back, I replaced my laptop's optical drive with a 500 gig HDD to try to move some of my media and documents over. However, when I went to install the latest service pack to Visual Studio today, I noticed I didn't have enough space to install it. I used a simple tool called TreeSize Free to analyze the disk space and see what was taking up all the room. A quick drill down of the largest item showed that the WinSXS folder was talking up 10.2 GB of space.