I got iPAQ 3950 from my uncle. I could use it until I updated this patch - sp25682 : iPAQ H3950/H3955 SD Card Driver Updates.
It couldnot update completely so it showed error that some files missing - AH_ENG, HH_DD (If I remember right names).
Moreover, I could not connect it with my PC via ActiveSync 4.5 again and many icons in setting -> system are gone e.g. Power, Asset Viewer.
After that, I try to fix it by the hard reset, but it does not show file missing error message only.
The icons and activesyn still doesn't work now.
Do you have any solution to help me? Could I very hard reset?