From FourthAmendment.com:
Defendant had no reasonable expectation of privacy in his computer from police accessing it via Limewire when he was hooked up to the Internet. He did not create an expectation of privacy from his efforts to hide files on his computer. Warshak has no application to this situation. United States v. Conner, 2013 U.S. App. LEXIS 7437, 2013 FED App. 0365N (6th Cir. April 11, 2013)
Read more about the opinion on FourthAmendment.com.