startup freeze after pc mouse install

Is the PC mouse supposed to work with the Mac Mini? Does the Mac Mini have a pinhole next to the CD slot for using a straightened paper clip to remove the CD manually?

First problem, get the CD out.

Restart the computer (hold down power key until it shuts down, the push to start), then hold down the Command (apple), Option, O and F keys as soon as it starts and hold them down until the Open Firmware window appears.

Then type "eject cd" in lower case (no quotes).

Your basic problem is that your mouse driver is probably not compatible with the OS system version. The manufacturer might have an update, but that doesn't solve your problem starting up. You will need a Mac mouse at this point.

Try holding down the shift key until the blue screen appears. This disables some drivers and might get the machine booted. If it does and the mouse install CD has an "uninstaller" RUN IT!

Otherwise it will require some grubbing around in the Library which you may not be eager to do.

Log on to the mouse manufacturer's site and see if an updated driver to match your OS is available. You need to know your OS version and whether your machine is intel or Power PC.

Check this by going to the blue apple, pulling down to "about this Mac" and the Mac OS X screen will tell you what OS version you are running, and should tell you what processor is installed. If the latter data is not clear, click on the "more Info. . ." button and the hardware overview will supply the CPU data.

Sorry your having trouble, changing operating systems is always uncomfortable, and having driver trouble right off the bat is a real pain.