An anonymous reader writes, "The U.S. Attorney for the Southern District of New York has launched an investigation into Dell's finances and has subpoenaed company documents going back to 2002. Dell execs had previously said they didn't think any of this would add up to any material impact, but that seems to be a possibility now."
More accurately, this is a continuation of an ongoing "informal" SEC probe. That probe has caused Dell to delay its financial reporting
and raised the possibility of needing to restate previous quarters' earnings.