Re: Very strange problem!
I've seen similar things with a few other computers. They were all fairly slow computers, though I couldn't swear the problem came exactly from lack of resources.
In those cases, I had lockups that I was able to clear by removing the disk. I think I was able to work around the problem by letting the computer run for a while--complete the various tasks that still go on after logon. Then, when the hard drive light was less active, I was able to use the disk. At least, that's the way I remember it.