Microsoft didn't force people to buy Windows, "all" they did was install IE by default and they got done for that. Precedent disagrees with you.
How did that whole government intervention thing work out with respect to Microsoft? 20 years later they still have the same dominance in operating systems and productivity apps. No one cares about browser dominance except for Google.
Most people don't by Window's in a store, it's pre-installed on PCs and Microsoft did, in fact, force computer companies to buy Windows licenses for every PC regardless of what OS it came with and they threatened to pull their licensing entirely for any company that didn't abide.
Ironically, this is not what got them into trouble.