Install error message "0K required, 0K available"

I have not been able to update system 7.5.3 because of an error message "0K RAM required, 0K RAM available".  All basic tshoots done (rebuild desktop, DiskDoctor, ext off, First Aid, PRAM)  Adjusting RAM in Info no help.  About reports 86 MB available RAM on 98 MB system.  
lasarianAsked:
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naxConnect With a Mentor Commented:
1. Check your physical RAM - they may be damaged.
2. Your Existing System appears to be damaged. - try installing a fresh system (backup the old one just in case) then upgrade the fresh system.
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becredclayCommented:
What are you trying to update to?
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lasarianAuthor Commented:
Does not matter.  Got same result with every possible upgrade.  Why did you think that was important?
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naxCommented:
Try to check the updater.  If the error message comes out when you double click on the updater or there is an error message even if you Get Info on the updater, then the updater is damaged. Get a good copy of the updater.
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naxCommented:
Try to check the updater.  If the error message comes out when you double click on the updater or there is an error message even if you Get Info on the updater, then the updater is damaged. Get a good copy of the updater.
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naxCommented:
Try to check the updater.  If the error message comes out when you double click on the updater or there is an error message even if you Get Info on the updater, then the updater is damaged. Get a good copy of the updater.
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