Infects: [Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP]
Description:
Packed.Generic.290 is a heuristic detection for files that may have been obfuscated or encrypted in order to conceal themselves from antivirus software.
Impact: Not Available.
Propagation: Not Available.
For Further Information: http://www.symantec.com/norton/security_response/writeup.jsp?docid=2010-030201-5617-99
Solution:
Disable System Restore (Windows Me/XP). Update the virus definitions of your antivirus product. Run a full system scan.