Windows 7 not booting after installation of Windows 8 ! Help !

Today I installed Windows 8 Consumer Preview on my D:/ Drive with already dual boot Windows 7 on C:/Drive and Ubuntu also.
Ubuntu is working fine but when i select the Windows 7 Option the computer loads up the files for automatic repair.

I don't know what had gone wrong.Windows 8 and Ubuntu are working fine.But not Windows 7 ! Help me !
How do i uninstall the Windows8 to get the older GRUB displaying the two options at boot up-Windows 7 and Ubuntu or if there is a way to make Windows 7 working with Windows 8 and Ubuntu

Someone help me out I'm not able to boot in Windows 7.Every time i try to do so,It starts up with the automatic repair dialogue box.

Any other thing i could do to uninstall the Windows 8 so that i get my older Windows 7 and Ubuntu working

@everyone I'm quoting a thread post from another website posted by a user who had the same problem.Can anyone help me out as what he did to get out of the problem ?

Jerry
says: September 16, 2011 at 7:03 am
I did the install just fine, but now when I try to boot back into Windows 7 it says “Preparing automatic repair…” and I get a repair screen. Letting it look for problems comes back empty and I can’t get back into Windows 7, not even by F8 since it’ll put me back into repair when I hit it. Anyone else have this issue?
Reply
Jerry says:
September 16, 2011 at 8:06 am
Never mind, turned out it was something I did with a modification I had done that was stopping winload.exe from working correctly. I restored the file from the DVD install and now it’s working correctly.
Reply

@everyone I'm quoting a thread post from another website posted by a user who had the same problem.Can anyone help me out as what he did to get out of the problem ?

Jerry
says: September 16, 2011 at 7:03 am
I did the install just fine, but now when I try to boot back into Windows 7 it says “Preparing automatic repair…” and I get a repair screen. Letting it look for problems comes back empty and I can’t get back into Windows 7, not even by F8 since it’ll put me back into repair when I hit it. Anyone else have this issue?
Reply
Jerry says:
September 16, 2011 at 8:06 am
Never mind, turned out it was something I did with a modification I had done that was stopping winload.exe from working correctly. I restored the file from the DVD install and now it’s working correctly.
Reply

@whs light blue screen bro !

@whs I found this thread similar to my problem Solved Windows 7 & 8 Dual Boot Problem - Windows 8 Forums .can't figure out the final solution.Can u help me