Why is my Macbook Pro constantly freezing?

Question

Ok so here's the story about how my mac got a brand new battery and a clean wipe and it's acting like it gained age... Meaning that it freezes constantly as if it were extremely old and overused. I've even referenced the web and found out some tricks to see if the disk is ok by doing safe boot (holding down the shift key), running the disk utility to verify the disk and even going into Single User Mode (holding down command + S and typing fsck -fy to fix any errors) but it'll ALWAYS tell me that it appears to be ok... clearly it isn't cause even after doing this SEVERAL times I get blue screens, gray screens with lines, black screens, random freezes if I manage to even get it to the my main screen and so forth.
I also have windows partitioned but I haven't used it so what can I do?

Answer 1

Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.