are you trying to install or trying to UNinstall the product ?
If the normal uninstall does not work , perhaps you can go back to a previous made storepoint in Windows XP.
If you have no clue what the heck a storepoint is , you probably haven’t made one , so then it’ll have to be uninstalled on other purposed.
What you can do is boot up your pc in safe mode and try to uninstall it then. The open regedit and delete every roxio and easy cd creator reference. do NOT remove Adaptec drivers ! They can be necessary for the operating system to run.
If you are not too sure if this method will work , then first make a storepoint in normal boot mode(see your windows help files) and then boot to safe mode and uninstall/regedit.
If the product does not want to install , this can be because of various things. Perhaps the product is trying to install ASPI drivers which are pretty outdated (Remember EZCD 4 was out way before Windows XP). In this case it can be better to update the ASPI drivers from the Adaptec website and then try again to install.
Also be sure to update the product from the updates available at the Roxio.com website.
I do recommend NOT installing EZCD 4 , but go straight to 5 if possible.