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I have over 64 MB of memory. All of my system memory is recognized under Windows, but some of it is missing when I boot DOS
Explanation: All of the system memory in the PC can be accessed and used under Windows, but only 64 MB of it can be seen when booting to DOS or using DOS programs.
Diagnosis: Standard DOS cannot access more than 64 MB of memory due to limitations with the extended memory manager it uses.