Shut down problem

[Skehan Adrian]

An old friend with an eMac (1ghz) installed Tiger last week and now  
has problems shutting down -- he gets the black screen with  
instructions to restart in a multitude of languages (a Kernel Panic I  
think its called).  He has removed Norton's and run Disk Utilities --  
Repair Permissions all to no avail.

Any suggestions on what to do next will be appreciated please.
Adrian