i can tell you this right now; if you dont know how to install windows take it to a friend or to a tech that knows how. After you install windows you will need the drivers for your devices. Your not even sure how to get into the bios ? best of luck
when you get into recovery console if you havent set and admin password just press enter. Piece of cake! Use these next commands to repair windows.
md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy...