It swept my fears :)

Having even me build my PC I was very worried about the various comments on the OEM version.
First you must know that this one is reserved for frabriquant only and is prohibited for sale (unless special permission!)
Then this version sold by Amazon costs less expensive of course, but it means LCP?
LCP is a package means "light", you will only receive the CD (with the activation key on the box!), Which does not change anything. The DSP meanwhile is "normal" (I can not remember its meaning).
The instalation is surprisingly easy! Just follow the steps to everyone!
You will also have "approved" that windows 7 is activated automatically by the internet (which is why I did not have to do it myself and I have no problem with that famous activation problematic to some .)
Honestly, for all reluctant builder, I recommend this product which is not expensive that ON really costs.

In addition to this, the product is sold by Amazon and you will be entitled to the divine service from amazon (and premium delivery in a day, not seriously, I ordered at 16h to receive the next day at 10am. )

/! \ The OEM version is only made for pc "virgin" and without operating system. So I do not guarantee the accuracy of my review if you just want to upgrade your system.