<human>: Can you summarize the given text in a few sentences?

Hey all.
So today I was trying to update my Java on my Windows 7 computer. I screwed it up without knowing. Later that day my little brother tried to play Minecraft. Something pops up saying "couldn't locate Java" blah blah blah. I, instinctively, reboot the computer. Just in the beginning process of booting up i get the black screen saying "BOOTMGR is missing
Press CTL + ALT + DEL to continue"
So I did. Same thing pops up.

I soon realised that when my dad gets back I'm in deep doo-doo. I think of how I'm going to fix this. It comes to me. I went out and bought his favourite candy (Whoopers) and wrote his a 2 page appology. When he gets home he reads the letter. Asked what happened, I explained and showed him. He just simplied unplugged an external hard drive and the computer rebooted with no problem.

I'm clearly not a computer whiz.
Oh well.
Although the Java problem isn't fixed.
<bot>: I thought I broke the computer. Buy my dad candy and write appology. Dad does a (stupidly) simple fix. I am dumb.