According to another article, the program has been installed on Lenovo computers beginning at least mid 2014.
Models affected include:
G Series: G410, G510, G710, G40-70, G50-70, G40-30, G50-30, G40-45, G50-45 U Series: U330P, U430P, U330Touch, U430Touch, U530Touch Y Series: Y430P, Y40-70, Y50-70 Z Series: Z40-75, Z50-75, Z40-70, Z50-70 S Series: S310, S410, S40-70, S415, S415Touch, S20-30, S20-30Touch Flex Series: Flex2 14D, Flex2 15D, Flex2 14, Flex2 15, Flex2 14(BTM), Flex2 15(BTM), Flex 10 MIIX Series: MIIX2-8, MIIX2-10, MIIX2-11 YOGA Series: YOGA2Pro-13, YOGA2-13, YOGA2-11BTM, YOGA2-11HSW E Series: E10-30
here is an article with links to sites that will scan your computer for the adware:
Windows Defender updated to remove all traces of the adware: