AUTORUN FOR CD OR DVD CAUSES SLOWDOWN?? TRY THIS

Windows has a feature called Autorun that automatically detects when a CD or DVD has been inserted into the drive. That's nice, but the downside is that in the background, this feature is constantly asking your drive if it has anything new inserted. This can cause your CD Games to "hiccup."
You can turn off this feature in Control Panel. Select the System Icon. Click the Device tab and open the CD/DVD drive. Right-click the name of the drive you want to alter and select Properties. Click the settings tab and uncheck the Auto Insert Notification