Apple has proactively gone through a process of removing a number of applications from its iOS App Store after a framework within those apps was discovered which violates the developer guidelines. An analytics firm had recently discovered the issue by shedding light on the fact that the Youmi advertising SDK - meant for China - uses its integration in iOS and Android apps to collect and store personal information about the user of the app, seemingly without consent. Such activity is prohibited by Apple's App Store guidelines and as such, the iPhone-maker has been quick in reacting to the discovery.
Lenovo has gained a lot of fame recently for making quality laptops, among other things. However, a recently-uncovered "feature" in its laptops, allows Lenovo to install their own software on the laptops - without the user's permission and/or knowledge - even if a clean install has been performed using a Windows DVD or flash disk.