Allow me to explain more.
The master boot record is a section of computer code that the BIOS loads and executes to start the boot process. When this code executes it transfers a control to the boot program stored on the boot (active) partition to load the operating system.
In other words, this code is important for your computer to boot, and not normally locked or protected. This makes it possible for malware writers (the bad guys) to write over that code, and put their own code in there. Although the computer would still boot, it would also load that code the malware author inserted in.
However, there are certain devices that may protect the MBR, and if the MBR gets damaged, the devices can cut access to the MBR, making it hard to re-write it.
When the fix for MBRCheck executed, it was blocked from fully re-writing the MBR code, causing the computer to no longer boot.
What we need is a recovery disc to help get it to boot.
What I was saying, is that the safest way to re-write the MBR is to use the Vista disc. However, this does not make it impossible for it to boot up again without the Vista disc.
Now, what we need to do is a little workaround, aka the hard way...in order to get the MBR re-written safely.
We can use this: The Ultimate Boot CD, which is a Windows Recovery Environment made to run special utilities and fix the Operating System...
Download the program to burn it, and read the instructions here: http://www.isoimageburner.com/
Download the ISO file for UBCD from here: http://ubcd.mirror.fusa.be/ubcd502.iso
The ISO for UBCD will be burnt using the ISO Image Burner.
Let me know when you have the CD ready, so we may continue fixing your computer.