Motorola Mobility has been granted an injunction against the distribution of key Microsoft products in Germany.
The sales ban covers the Xbox 360 games console, Windows 7 system software, Internet Explorer and Windows Media Player.
It follows a ruling that Microsoft had infringed two patents necessary to offer H.264 video coding and playback.
A US court has banned Motorola from enforcing the action until it considers the matter next week.
The handset maker is in the process of being taken over by Google.
This is just one of several cases involving about 50 intellectual properties that the smartphone maker has claimed that Microsoft should have licensed.
Microsoft has said that if it met all of Motorola's demands it would face an annual bill of $4bn (£2.5bn). Motorola disputes the figure.