CAN'T FRESH INSTALL MOUNTAIN LION

I have a mid 2010 17" MacBook Pro.

Had been using it for years till now.

Recently, I reinstalled mountain lion and boot camp (for web ATM).

The first time it couldn't boot up was 2 weeks ago. No matter how I try, just couldn't boot up after I used **** windows.

I thought it was virus from windows, so I re-do it again.

This time, I can't even fresh install mountain lion, it says there's some problem with the installation program, and ask me to try again.

I even made a flash stick of ML, and says the same thing.

I tried all the disk utility stuff. verify, recovery, clean.

And I used the Apple Hardware Test tool to test it, says nothing wrong with my mac. (I did extention test as well.)

My Hardware Description:

Name: MacBook Pro

Model: MacBookPro6.1

CPU: intel Core I5

Core Number:2

CPU Speed: 2.53 Hz

L2 Cache: 512 KB

L3 CPU flash memory: 3 MB

BOOT ROM VERSION: MBP61.88z.0057.B0F.1112091028

System Serial: C02DXOXODC79

What happened to my MBP???? Please help~

Thanks in advance if any reply.