On my current laptop which is the second one I've had from Lenovo, as well as on several other Lenovo laptops of my friends, I've usually removed every single removable thing made by Lenovo. From my experience, just about one out of a dozen these programs is at least semi-accessible, and they've never been useful for anything to me or to my friends. Or, in other words, none of us has ever missed a single feature. :-)
The increase in system performance and stability is usually dramatic, and I believe it also improves security theoretically, having just what was supposed to be on the system itself. Since I remove all the preinstalled metro apps as well on Windows 8 and 10, this goes even further than just OEM software. :-)
I've done similarly on several HP and Acer laptops, one Fujitsu laptop, and I bet the situation is exactly the same with other OEM's.
Not to mention that many of these support centers, autoupdaters, diagnostic services, customer experience programs and whatnot have been known to contain functional malware or at least borderline cases or a lot of security holes in the best cases. A lot of stories like this can be googled from the past, as well as an occasional present one every now and then.
Lukas
I won't be using this account any more or participating in the forum activity through other childish means like creating an alternate account. I've asked for the account to be removed but I'm not sure if that's actually technically possible here. Just writing this for people to know that I won't be replying, posting new topics or checking private messages until the account is potentially removed.