Blue Screen after dual boot Windows 7 RC and Vista

Hello!
Let me explain my problem quickly and clearly:

1) I have a 80GB hard drive with a partition in which Vista is installed, so it is my only OS.

2) Out of curiosity I wanted to install Windows 7 RC to test, so I used Gparted to create a second partition on my hard drive, I made the resizing of my 80 GB partition (by reducing) it in such a way that I find myself with a 65 GB partition (the one that should be Vista) and a 15 GB which I intended to install Windows 7RC .

3) The operation seems to resize perfectly, but since then if I start my PC, it boots normally but after the loading screen, and the message "welcome", I have the words "Preparation office "that appear for at least 3-4 minutes.

And then I get a blue screen total (instead of my office) with the following message:

"Rundll.exe etc" Windows can not access devices etc.

I have the installation CD for Vista

I did research and performed the operation (restore to an earlier time, trouble starting with the installation CD in Vista, type the command "fixmbr" or "fixboot", start in safe mode but nothing happens .....

So, do you have a solution, this is the first time it happens?

I will keep you informed on the progress of the thing.

I understand that the probEme could come from a hidden partition, but it is to be remained active.

If you do a Search for the file you should find it in C:\I386. You can copy it and then paste it in C:\Windows\System32

OR
You can try the System File Checker.

http://support.microsoft.com/kb/310747

insert your Windows CD ROM disk in the CD ROM drive. Click Start|Run, type in:

expand X:\i386\rundll32.ex_ c:\windows\rundll32.exe

in the Open box, (where "X:" is the letter of your CD ROM drive), and press [Enter]. When it's done, restart your computer.