Can't boot Vista - Error 17: File not found

Yesterday, I installed the Windows Vista Service Pack 2 and now my notebook won't boot. It gives me this:

 

 

Booting 'Windows Vista'

 

acpi

Vista Loader 2.1.2

 

Done!

fallback 1

find --set-root /bootmgr

 

Error 17: File not found

Booting 'Windows NT/2000/XP'

 

fallback 2

find --set-root /ntldr

 

Error 17: File not found

Booting 'Enter Command Line'

 

Boot failed! Press any key to enter command line.

 

 

 

I also updated the Nvidia driver and installed Orca and Bluestacks Android Emulator yesterday, if that helps.

 

I have a Compaq Presario notebook, and Vista Home Premium. My notebook had 2 partitions, C:/ and D:/. C: was for Windows and other programs and D: was for games, videos, and pics.

 

 

How big did I screw it up?

 

Did you ever put GRUB4DOS on the computer, or did it show up, mysteriously?

Also, consider trying:

parttype (hd0,0)
parttype (hd0,1)
parttype (hd0,2)
parttype (hd0,3)

and sharing the results, here.