There have been reports of Lenovo preinstalling bloatware on their consumer line of computers with one of them having a security risk. Many PC manufacturers install trial programs and ads on computers they sell called bloatware to make extra money. They are usually not a problem but can be annoying to uninstall them all on a new computer. A program they installed to serve ads based on the images you are viewing can be used by other websites to do harmful things to your computer.
Microsoft puts a stamp on clean computers called Microsoft Signature Edition they have none of these programs or ads installed and they work better.
To check if your computer has a program that works like superfish click the link below.
Lenovo has released a tool to completely remove the program.