String review, as promised :)

String review, as promised :)

Found and fixed:
- some untranslated macros
- some acronyms which were not in capital letters
- a couple of VLC Media Player (_m_edia _p_layer, now)
- typos here and there
- dots missing in some of the long texts
- spaces before ? and :, which is correct in french but not in english :)
- NT services are now called Windows Services