Instaling a new window give my laptop aproble

Hello, it just 4 days ago when i buy a laptop in a brazilian shop and i change a window vista to a window server because the vista was in portuguse and me my portuguse is very poor it has force me to put a server wich is in english.but now my laptop lost avery thing ,eg camera,bluetooth,and many more prgrames .i think is better just to take it back to the shop ,so that they can send it to the produser for fixng .please what are you thinkng ,please help me ,i do need your help!!!!!!