answer number 1. : because if you have run english ms-windows you can not see what i wanted to write.
q.n.2.: how to ...?
...
q.n.3. : why i do not write ...?
a.n.3. : because i have run english ms-windows.
q.n.4. : why i have run english ms-windows ?
a.n.4. : because it is more stable (maybe) than czech ms-windows.