Unity Crash, Editor and Builds

Hello,

I work on a school project with other students on a Unity / Oculus Rift / Leap Motion project.
Everything was fine, until I reinstalled my laptop, when I changed my Windows 8 to a Windows 7.

Since then, I can't launch the project, and I'm pretty sure that it comes from Oculus Rift AND the fact that I've reinstalled my computer.
When I launch the game through the Editor, Unity just crash with an error report.
I made 4 binaries when building, 2 in x86 and 2 in 64 bits. Each couple contains classic binary + DirectToRift binary.

• Classic x64 = Game launch, shows the Unity screen and crash with an "Oops!" from unity


• DirectToRift x64 = Game doesn't launch and crash "Game has stopped working"


• Classic x86 = Game launch, shows the Unity screen and crash with an "Oops!" from unity


• DirectToRift x86 = Game launch but doesn't show Unity screen, and crash with an "Oops!' from unity

Here's one of the dump (they are similar)

Unity Player [version: Unity 5.0.1f1_5a2e8fe35a68]

OculusPlugin.dll caused an Access Violation (0xc0000005)
  in module OculusPlugin.dll at 0033:e6c32390.

Error occurred at 2015-06-09_115622.
47% memory in use.
8112 MB physical memory [4275 MB free].
16221 MB paging file [11972 MB free].
8388608 MB user address space [8388235 MB free].
Read from location 00000000 caused an access violation.

As I have problems with Windows Update I don't have any Windows 7 update, I'm just with my default installation
I was wondering if there are any update that are required for Oculus Rift to work ?

My configuration:

• OS: Windows 7 SP1 64 bits
  Laptop: MSI GE60


• GPU: GTX 765M


• CPU: i7 4700MQ


• Unity: 5.0.1f1


• Oculus Rift Runtime: 1.7 (6.0.0)

Beside my laptop, the project works on every other computer and laptops including some Windows 7 and Windows 8.

Hope I gave you enough informations, ask questions if you need somethings.
Thanks for your future responses