Windows freezes during loading.

I got problems with my PC. When he starts, the PC is unable to go further than this screen

Once in this screen, it restarts.
I tried the chkdsk / p and chkdsk / r but it does nothing. It recognizes and repair errors on the disc again but it has always planting once I restart.

What to do??

Thank you for your help!

In this case you have to run a repair of Windows
Do not mistake and am the tutorial, you must choose "R" in the second table and the option "Install" at first.

Thank you for your help!
So before you reinstall, I said I'll try Safe Mode again just in case ... And it worked.
So the chkdsk / ra running Windows but does open in Safe Mode. If I ever want to start in normal mode, nothing, it restarts ...
I gather that this is not a hardware fault because when I arrive same access to safe mode (Am I wrong to think that?)

So once back in safe mode I've saved all its valuable data and I restart the PC with the XP Pro CD.
I began the reinstallation, copying files goes well but reloading the same. His blocking has arrived once the screen loading Windows.

Now I find myself in the position where I can not even access Windows in Safe mode because the "setup" is not finished!

I can format because all the data are stored on my external HD. But I have no guarantee that it will not crash again once formatted.

In short, you would have no other solutions or ideas?

Thank you very much!

If you have several barettes memory on this PC removes all but one of course.
Retry repair