Solution : https://service.sap.com/sap/support/notes/132167 (SAP Service marketplace login required)
Key words :
additional key words winhelpextended helpsapguihelp_04, \winnt\program files\sappc, \winnt\programs\sappc, winhelp documentation, context sensitive, -----------------------^solution install, prerequisites
Related Notes :
572560 | Performance Assistant and SAPGUI |
101481 | Collective note: Application help and R/3 library |