Error Reading Package
Background: My computer was shut down over the Thanksgiving holiday. When I started it again on Monday, my Mail would not work properly. I kept getting messages with it and Safari saying that the program had been updated and something else about keychain access. (Sorry, I didn't write that message down.) I got Safari to work but not Mail. I used Disk First Aid and Repaired the Disk, but the only thing it fixed was a mapping error. By the way, I am not able to verify or repair permissions--don't know why, but those options are always grayed out.
In looking for info, one of the Help screens about keychain access mentioned the possibility of a virus. I didn't think that was likely, but I downloaded a trial (free) Sophos Anti-Virus and ran it. It found one virus and this is the message:
Virus: 'Troj/Openstr-B' detected in Macintosh HD:Users:Kathi:Library:Caches:Java Applets:cache:javapi:v1.0:jar:javainstaller.jar-3cc#CFE48.zip/javainstaller/Ins tallerApplet.class
Sophos Anti-Virus deleted the infected file, which I think has made the installer not work (because that file is now missing).
How can I fix this?
Thanks!
iMac G5 Mac OS X (10.4.2)