First, let me tell the whole history.

I have a Samsung notebook series 7, bought last year. I had 2 partitions, C: and D:
About a two weeks ago, I tried to install ubuntu with my windows 8. First, i used the computer management (through command line), to get 100gb from D: to install ubuntu. I think it created a dynamic partition on D:, with the 100gb unallocated, and the rest.
When i installed ubuntu, it would't let me use that 100gb, so i created a new partition from the installation itself. It worked, i installed a bunch of things, and then went back to windows 8. Since i had created a 100gb and didnt use it, i tried to extend my D: partition to get it back. When i did it, my ubuntu screwed.
Well, i thought the problem was the dynamic partition, so at windows, i deleted some of the extra partition inside my dynamic partition (D, to have only one. After deleting, i tried to install ubuntu again, but the installation crashed. When it restarted, my windows 8 stopped booting.

The error that appears it's a blue screen, saying:


Your PC needs to be repaired.
An unexpected error has occurred.
Error code: 0xc000225
You'll need to use the recovery tools on your installation media. If you don't have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer.

Press Enter to try again
Press F8 for Startup Settings
Press ESC for UEFI Firmware Settings.'

Reading this, i searched how to have a recovery tool. I ended up installing windows 8 on a 4gb USB, with the MS install windows (using his PK because i don't know mine)

I tested the USB on my brother's PC (the one im using atm), and the boot worked.

When i tried to use it on my PC, it didn't worked. I entered BIOS to set the kingston pendrive priority to the top (UEFI: Kingstom), didn't worked. I disabled Password on Boot, didn't worked. I disabled Secure Boot, choose CSM OS, CSM WITH UEFI, didn't worked too.

Now i'm stuck, i'm googling for solutions but i can't find anything to help me.
Any help is appreciated, i have no clue what to do now .

Thanks in advance, sorry for bad english and if i didn't provide enough details, please tell me.