You could restore it to factory condition or to your last full backup and hope it's a software issue.
I'm seeing a lot of subpar posts recently. That is, so little information that your only answer is to ask for more and return the machine to factory condition. To everyone, try a little harder and you'll get better replies than to wipe it back to factory conditions.
My computer is a bit wonky,
1) the screen always freeze and show statics
2) press power button but cannot start machine, need to try many tims to get it started
3) RAM usage is very high, only a few windows the 8GM is almost use up and causing crushed or programme auto close
How do i fix it?