please refer to this link to get up to date with the problem so far. thanks.
i thought i had sloved the problem by uninstalling the cd drive from my computer and letting auto detect reinstall it after rebooting my machine. i have done this twice successfully but it is not a permanent solution because after i hae installed a program and rebooted again, say the next day, if i put another disk in to install i encounter the same error message again. help PLEASE.