Example from the FTC's website:Microsoft didn't make it hard to use browsers other than IE with Windows. Ever. The issue there was bundling.
Microsoft was found to have a monopoly over operating systems software for IBM-compatible personal computers. Microsoft was able to use its dominant position in the operating systems market to exclude other software developers and prevent computer makers from installing non-Microsoft browser software to run with Microsoft's operating system software. Specifically, Microsoft illegally maintained its operating systems monopoly by including Internet Explorer, the Microsoft Internet browser, with every copy of its Windows operating system software sold to computer makers, and making it technically difficult not to use its browser or to use a non-Microsoft browser.
Also, Tesla bundles a navigation system in every (modern) Tesla vehicle that automatically navigates to the Supercharger instead of other fast chargers.