Microsoft has so far disputed the claims and also says "that four fifths of the claim applies to video frames in Windows Media Player, which is available as a separate, free download and so wouldn't generate royalties for Alcatel-Lucent."
Alcatel-Lucent began its set of lawsuits in 2002 but had them split up and separated by technologies. In 2003, the company won a $1.5 billion USD verdict from MP3 audio patents but the verdict was overturned this year. Earlier this month however, the company won $368 million USD from Microsoft over patents relating to touchscreen technology.
In response to the suits, Microsoft has filed a countersuit accusing Alcatel-Lucent "of violating nine patents relating to interfaces and messages on both computers and fax machines."