Ya, from reading your first post, I suspected a possible memory issue as well.  Power hits on a PC are never a good thing, and on Linux they are even worse lol.  Did you remove the kernel properly before you reinstalled it?  Is that what the "dpkg -P kernel-image-2.6-k7" command is?  I normally just use "apt-get remove kernel-image-2.6-k7" or some very similar command to automatically remove everything. 
		
	
		
		
		
		
		
		
			
		
		
		
		
		
		
	
		
		
	
	
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