I was having my work and I was installing a kind of disk which is the AutoCAD 2009. I got a trouble midway upon installation. At first it went well and fine, until it stopped and an error window appears stating the disk is needed to be inserted. I was puzzled, the disk was already inserted.
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Now come to the point. As per your question, they're already running install AutoCAD 2009 and suddenly you got a message that please insert the DISK. Please note, this is not an uncommon problem. Everyday we are facing same problem with some software CD. Anyway when you get this message, please push Eject button, when CDs came out then again inserts it and see the result. If again you get the same message then Please check your DISK, there you may find a scratch. That’s why the CD ROM not reading file from there and as a result showing this Message.
If the setup disc you are using for AutoCAD 2009 is a single disc, the error means the optical drive is having a hard time reading the contents of the disc. If this is the case, try inserting a different disc then see if the disc can be read successfully. If the drive has no problem reading a different disc, try inserting the AutoCAD disc again then try installing.
See if this works. On the other hand, if no disc can be read successfully, you should try cleaning the lens of your optical drive. If your DVD player has a lens cleaner, you can use it to clean the lens of your optical drive. You can also buy online like this one from Amazon: Philips Blu-ray/DVD/CD Laser Lens Cleaning Disc.
But if you are installing AutoCAD using an installer file, the installer is probably corrupt or damaged. In this case, try downloading the installer again from a reliable source.