It's possible that the install material or even the computer hardware has just deteriorated over time. My very old computer, for example, has trouble reading CDs that work fine in other computers.
Which operating system are you trying to install? Don't try to install Windows 3.1, because you won't be able to run programs such as Internet Explorer and MSN Messenger. Usually Windows 98 will run well on old computers, or you could install Linux.
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With our extreme gelatinous apology,
We beg to inform your Imperial Majesty,
Unto whom be dominion and power and glory,
There still remains that strange precipitate
Which has the quality to resist
Our oldest and most trusted catalyst.
It is a substance we cannot cremate
By temperatures known to our Laboratory.
~ E.J. Pratt
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