kdecore/util/kmacroexpander_win.cpp

missing function bool KMacroExpanderBase::expandMacrosShellQuote( QString &str, int &pos )

impact on: can't start an application with the help of klauncher/service files

kdecore/date/ktimezone.cpp

missing windows support

impact on: all functions where you need a calendar?

kdeui/windowmanagement/kwindowsystem_win.cpp

nearly all functions need an implementation

kfile/

proper creation of a fake root for "My Computer" which contains the drives so one can navigate between drives on win32. Also currently breadcrumb mode creates a "Custom Path" entry instead of the drive letter. See also bugreport #154859

kdecore/

on mingw builds AltGr is not understood correctly -> not fixed by msvc fix.