This article is from the CD-Recordable FAQ, by Andy McFadden (email@example.com) with numerous contributions by others.
(This refers to systems upgraded from Win95 to Win98.)
This problem has been recognized by Microsoft. The resolution is posted on
The basic problem is that, after upgrading to Windows 98, copies of some
CD-ROMs (usually copy-protected games) will refuse to run, insisting that
you insert the original disc. Microsoft has recommended two methods for
resolving this issue. The first is to simply use the original disc.
The second recommendation is to make a new copy of the disc under Win98.
Why this works is unclear, and the Microsoft support pages aren't much
help. They only say that the behavior is not caused by a bug, but rather
"design changes in Windows 98". (It appears that using Win98 to write a
new session onto an existing disc will also cure the problem, but if you
aren't in the habit of leaving a new session open on copies of game discs,
this won't help you much.)
One possibility is that Win98 returns a value for the volume label that is
closer to what is actually stored (perhaps there was some sort of character
set conversion or truncation going on in Win95). Copy protected games
often check the volume label as a way of obstructing inexperienced software