Do you know what DriveCleaner is?
DriveCleaner is not what it says it is, it does not clean your drive. DriveCleaner is a fake anti-spyware program that displays false scans on your computer system. The scans may display exaggerated results using a scare tactic to get user to purchase the full version of DriveCleaner. DriveCleaner may look like a legitimate program that cleans your system but it is not. DriveCleaner is more of an annoyance with excessive popups when you're surfing the web.
In non-techie terms: DriveCleaner and the DriveCleaner website are designed by hackers to sucker users into purchasing the DriveCleaner software. Do not under any circumstances download, install, or purchase DriveCleaner. DriveCleaner is not a legitimate spyware removal tool.