Hi I'm having problems with programs shutting down and crashing after opening. I'm using AVG anti virus.
I see it has quarantined and cannot repair a few files incl. shell32.dll and ntoskrnl.exe.
could it be this?

As to the shell:

Go to Start/Run and type in:

regsvr32 /i shell32

Click OK.

Restart your computer.


You also might want to read this post and start a new thread in the Security section:

http://www.d-a-l.com/help/showthread.php?t=32403


As to ntoskrnl.exe:

http://www.computerhope.com/issues/ch000646.htm