Windows Vista x64 Ultimate boot problem

[sailpog]

Hi,
When i switch my computer on, it goes past the screen where it has the XFX logo (my motherboard logo). Then it goes to a screen and says :
Windows Root/system32/ntoskrnl.exe is missing or corrupted - reinstall to fix.
Or something to that effect...
Anybody know how i can fix this?
Thanks

 

[atomic tofu]

put os disc in reboot...recovery console...repair

edit: figure I give you links since I was so brief
How To Use Recovery Console on a Computer That Does Not Start in Windows 2000
Recovery Console - Wikipedia, the free encyclopedia