1. Reboot your computer and try the CD/DVD player again. Sometimes the problem can be resolved by doing this.
2. Purchase a CD cleaner for your CD/DVD drive, such as Fellowes CD/DVD Drive Lens Cleaner. It can remove oxide residue, dust and debris from the laser lens and may correct the problems causing an I/O error.

3. Try the CD in another computer if you have access to one just to see if it's the CD rather than the computer that is causing the problem. If you don't have access to another computer, try a different CD and see if you get the same error.
4. Alter the transfer mode on your CD/DVD drive. You can do this by going to the 'Start' menu, and then right-clicking on 'My Computer' and selecting 'Manage.' In the resulting window select 'Device Manager.' You should then notice in the right pane 'IDE ATA/ATAPI' controllers, you want to expand this by clicking on it, then right-click your CD/DVD drive and select 'Properties.' Next click on 'Advanced Settings.' At this point you should notice a transfer node box that signifies your CD/DVD drive; usually this is 'Device 1.' Finally, open the drop down menu and select 'PIO,' then click 'Ok' and exit.
5. Check to make sure all devices that are hooked up to your computer are turned on. For example, if you have an HP printer attached to your computer and it is turned off, this can cause an I/O error to pop up. As soon as you turn it back on, the I/O error should disappear the next time you reboot.
6. Download and run a registry cleaner on your computer. Often if Steps 1 through 5 don't correct the problem, cleaning your registry can.