I bought my son a Lenovo laptop about 9 months ago. It took me at least two hours to clean up all the adware/spyware/malware it came with. I blamed Curry's (amazingly it was the cheapest place) for it. It now appears that it was all Lenovo's fault.
Fortunately, I am paranoid so I inspected all the software and certs I could find to see what it was and removed everything I wasn't familiar with (which was pretty much all the 3rd party software)but some of it was very difficult to remove and would probably have been beyond the ability of the average user.
I am not impressed.