SystemDoctor installs without your consent.
SystemDoctor installs other types of spyware/adware.
SystemDoctor may hijack, redirect and change your browser.
SystemDoctor displays annoying popups while you surf the web.
SystemDoctor compromises your privacy and security.
SystemDoctor is difficult to uninstall.

Ron is dead asleep so I can't recommend a program to help you get rid of it. I am not certain spybot can handle it .