Ok listen , the battery should be kept in , it remembers all the settings in the bios including time etc.
Now time for the lesson, which sadly you are learning the hard way.
If you have no knowledge of overclocking (and it sounds like you don't) then you need to read, read and read up on it. Google is a great friend on this!
Every system and CPU is different, you also need software on windows for monitoring overclocks such as coretemp, cpuz and you need to test stability using programs such as prime95.
Really if I was you I would class this as a lucky escape and thank god you didn't wreck your new system.
Like I say do some research on it and lots of it before you even consider overclocking again.
Goodluck with your dad