My apologies for resurrecting a long dead thread, but I just collected the links today because I've had multiple places I wanted to reference them this week.
https://www.cnet.com/how-to/lenovo-superfish-adware-uninstall-fix/
https://www.pcmag.com/article2/0,2817,2477277,00.asp
http://www.zdnet.com/article/lenovo-reportedly-blocking-linux-on-windows-10-signature-edition-pcs/
https://arstechnica.com/information-technology/2015/02/lenovo-pcs-ship-with-man-in-the-middle-adware-that-breaks-https-connections/
https://mangolassi.it/topic/11320/pentagon-warns-against-using-lenovo-equipment
https://mangolassi.it/topic/7748/lenovo-screws-the-pooch-yet-again-on-the-security-front
https://mangolassi.it/topic/5751/lenovo-accused-of-using-rootkit-like-methods-to-sneak-software-onto-clean-windows-installs
https://threatpost.com/millions-of-pcs-affected-by-mysterious-computrace-backdoor-2/107700/
https://www.theregister.co.uk/2019/08/23/lenovo_solution_centre_cve_2019_6177/
https://mangolassi.it/topic/14538/lenovo-if-it-s-on-your-network-you-are-breached/50