Basically a reboot will fix the problem for you, but I'm guessing you want to keep what you have on you HD. ntoskrnl.exe is one of your systems required executables, so one way or another, you're going to have to reinstall it. It should go into C:\WINDOWS\system32 and C:\WINDOWS\Driver Cache\i386 and most likely a few others. Find your windows installation disks and do a search. You should be able to select it and then do a cut paste. Once in the right directory it should work. Thats assuming your registry is still doing all the right things.
ntoskrnl.exe is the core (also called the kernel) of the Windows XP Professional operating system. Code that runs as part of the kernel does so in privileged processor mode and has direct access to system data and hardware.
During installation on single processor systems, Windows XP Professional Setup copies Ntoskrnl.exe from the operating system CD. During installation on multi-processor systems, Windows XP Professional Setup copies Ntoskrnlmp.exe and renames it Ntoskrnl.exe.
to put it in other words, your french-connection-UK-ed
A computer wuthout Microsoft is like a dream come true!
Now why couldn't I say it like that?
wouldnt know where to start!.......
just did it out of the blue!
most of this means nothing to me!
or have you *shock* been using software that somehow infringes digital rights management, which causes microsoft to be alerted, and shuts down anything remotely useful, turning your comp into a brick?