Spyware Doctor with Antivirus : This is one of the leading anti spyware and anti virus clients on the market and does remove Zlob.  We use it all the time in the field and the only protection software sold to out customers.

Other software programs that you may find useful.

Spybot Search and Destroy:  Perhaps the best free client software ever.  Does not give active protection so you canstill get re-infected.  Easy to use program and sure to hep out.

Malwarebytes free version: Our second choice for it being a free client.  Good stuff. Does not give active protection so you canstill get re-infected

Smitfraudfix.exe:  Free program that helps to remove Smitfraud and fake security clients.  Very easy to use and does help with Zlob removal