Daemon Tools

Hi, i have a big problem with Daemon Tools:
I had installed it and after a few days i had to uninstall it because.... i dont know. The program was uninstalled but the virtual drive was still there. Now i wanted to reinstall daemon tools, a error message appeared while the installation: "Some driver has invalid name or conflicts with other file or service in system. Please choose other driver names or make sure you have rebooted after removal of software using same names."
I dont know how to solve it