Microsoft’s OneCare deletes users’ emails
Several users of Microsoft’s OneCare are finding that the antivirus component is deleting entire folders of email.
What’s happening is that the program is finding a virus in an email attachment, and then it’s quarantining or even deleting the entire personal folder where non-Exchange Server user’s messages are kept.
Recovery is only possible if OneCare decides to quarantine the file.
If you’re using OneCare, it would be best to disable it until a patch comes out.
A fix will be included in the OneCare update set to be released on March 13.