I hacked your computer
You get hacked.
someone gets into your files and your personal information, and usaly puts viruses and other things that can harm your computer
Get your computer cleaned.
XBox live can be hacked, and if you have information on there that can also be found on your computer, then your computer can be hacked also. Firewalling your router is a good option.
yes it happend 2 my computer
If you have never had Internet on that computer nor used an electronic bulletin board service, then your computer can never be hacked into remotely. However, if you have recently had Internet access and been on a site that has a hacker, then it is possible that they already hacked in. Now, if somebody has physical to your computer and knows or can guess your passwords, it is possible.
Your computer crashes or freezes
no it can not
Do not connect to the internet.