Microsoft suffered its second legal setback in as many days on Friday with word of a second patent lawsuit from VirnetX. The accuser hopes to expand on the $105.8 million fine against Microsoft by claiming that Windows 7 and Windows Server 2008 also infringe on the same patents for VPN networking that were the subject of the prior lawsuit. VirnetX didn't specify what it hoped for in damages but characterized the second complaint as plugging a gap that would otherwise exempt newer versions of Windows.