Postal 2 protection (SafeDisc/SecuROM) imcompatible with CD readers

Euro CD
Problem:

When you try to play the game, a message says "Please insert correct
CDROM" even if the "POSTAL 2" CD is already in the drive. This means the
game is unable to detect an AUTHENTIC Postal 2 CD in your drive. By
"AUTHENTIC" we mean a CD purchased through a reputable software
retailer. If you have a copy or pirated version then this is normal and
won't be able to play.

Unfortunately, a few people have reported seeing this message even
when they have an AUTHENTIC CD. The solutions below have solved the
problem for nearly all the people reporting it.

Solution #1

If your computer has another drive that can read a CD (such as DVD,
CD-R, CD-RW) then insert the Postal 2 CD into that drive and start the
game again. Some drivers may read the CD better than others. If you
don't have another drive, or if your other drive didn't work either,
then try Solution #2.

Solution #2

Update the driver(s) for your DVD, CD-R, CD-RW or CD-ROM drive(s).
Updated drivers may allow the drive to read the CD properly. After
updating the drivers, try playing the game again.

If It Still Doesn't Work

If you tried the above solutions and the problem still occurs, then
you may be experiencing an incompatibility between your drive and the
copy protection used on the CD. You may have no choice but to return the
CD. We are working with the publisher, Whiptail, to come up with a
solution for the very small number of people that can't solve this
problem. We hope to have a further update on this
soon.