Read the rules. We don't support unethical activities here, and breaking into your parents' computer classifies as unethical.
Hacking isn't something that you are just taught. It requires months, years, decades of reading, research, trial and error...EFFORT in other words. You can't just go ask someone how to do it and learn it. One of the best exercises to begin your journey towards being what classifies as a hacker is finding the information on how to truly do it. The Internet is full of useful information. Being able to separate the wheat from the chaff is good practice. Try things, see what works and what doesn't.
Avoid crap sites like milw0rm and other things where you just run a program and it does some exploit for you. If you want to learn, you will look at how people do the attacks or exploits or whatever manually. Running scripts will teach you nothing.
Just another bit of advice; if you want people to take you seriously, take the time to properly form sentences, use punctuation, capitalization, and don't abbreviate words like someone down to "sum1". It makes you look like a lazy douche.
Hacking your parents computer would be very unethical, imagine if you found some rude pictures of them or found ut you were adopted lol.
If you ever forget the password on YOUR OWN computer i would suggest this little tool:
If your only looking to get access to there computer quickly then its simple. This also will not cause any damage to the computer.
Steps:
1) Download a linux distro (Ubuntu is best for this) choose the live CD if they have one
2) Burn to CD
3) Boot the target computer with the CD in the tray
4) When you get to the Ubuntu prompt screen, select the try Ubuntu option. (Can't remember what the wording is on there, I think it is option 1)
Once Ubuntu is loaded into memory you have complete access to any file on the hard drive.
Now if you’re serious about learning how to hack computers. First you need to learn everything about computer Operating Systems, unless you want to be a script kiddie.
Some good resources:
Windows Via C/C++
The Design and Implementation of the FreeBSD Operating System
And of course some C++ programming books.
Provided that you know how to use google properly you will find these resources for free online.