I put together a tool that scans files for PNG images containing Adobe metadata and was surprised that Windows is host to a lot of this gunk.
[…]
Windows Explorer, for example, is a critical Shell component in the startup hot path. But despite its importance, it’s comprised of ~20% pure garbage. ApplicationFrame.dll, responsible for Windows app title bars and frame gizmos, is ~41% garbage. Twinui, imageres, and other related components scored with much lower numbers but couldn’t fully escape Adobe XMP.

Source: Windows is Bloated, Thanks to Adobe’s Extensible Metadata Platform – Thurrott.com

Ouch!