Hi, look I have been facing a serious problem with my
System,
What I did is , I tried to install windows vista on already
Installed windows xp , I did it in the same fashion the as
Normally we do, I just inserted the bootable disk into the
Dvd drive and went with the whole process, it installed the
vista but at the end it displayed the message that
"windows failed to start. a recent hardware or software
change might be the cause"
"if window files have been damaged or configured
incorectlly.startup repair can help doagnoseand fix the
problem , if power was interupted during the start up
choose start windows normally"

"description; fix problems that are preventing windows from
starting "

Please help me get rid of this and securely install the
Windows
And one more important thing is
It automatically starts the repair process and shows the
Message
"startup repair can't repair this computer automatically "
That's all

Ok before I can tell you what you need to know, what's the model and make of your Computer?

(Example, Dell Inspiron 1500)