[EMAIL PROTECTED] wrote:

> > For instance, I was happily running Office 97 under NT when the computer
> > guys decided to give me an upgrade to Office 2000. Whether this event was
> > related or not with other upgrades, shortly thereafter I got a failure to
>
> Speaking of upgrades breaking things, I once had a machine that would
> occasionally crash running Protel under Windows 95, and I decided to upgrade it
> to Windows 2000 that was then in Beta. Windows 2000 died immediately every time.
> Investigating revealed that I had been using the machine with a SIMM module that
> had 3 pins not soldered for over a year! I fixed the SIMM and the problems went
> away. It seems Protel was the only thing under Win95 that actually used the
> highest blocks of memory, while Windows 2000 used all of memory right away.
>
> So sometimes a software problem is really hardware.

I think there is really a LOT more of this going on than people are aware
of.  I had an experience very early in my migration to Linux that brought
this out.
Long before that, I was in the middle of my biggest PCB design up to that time,
using
the last DOS version of Accel's Tango PCB.  Things started going wrong
faster than I could fix them, ie. half the board being lost when you closed
and reopened the file, etc.  So, I switched to Protel, which we had been
evaluating for a while.  I finished that project, and eventually the computer
was retired to my basement.  I tried to fire up Linux on it to experiment,
and compiles of the kernel would consistantly quit with a signal 11, which
is basically traceable to a bad page table lookup.  Another identical
motherboard worked fine.  Obviously, I had been running Windows 3.1
and PCB cad software for several years on bad hardware!  And, I'd been
blaming the software for all of it.  (Yes, the repeatable bugs I had with
Tango WERE the software, I still remember how to make the program
malfunction in about 5 keystrokes!)

Jon


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