unable to install CS6 because of pre-release version

hello,

some background info: I'm on Windows 7 running on 64bit.

i'm trying to install CS6 but a message saying that the pre prelease version of CS6 in my computer needs to be uninstalled. i tried uninstalling it but it wasn't showing up when i went to the control panel. so i went and deleted the folders/files. probably a stupid idea. i learned about the adoble creative suite clean up tool and used it to remove all the remaining files that were left uninstalled. but after running the clean up tool and rebooting my computer twice, i still recieved the same error message. is there another way to fix this? did i do something wrong? thank you!