The "undo" function occurs randomly while I am using any SW application, like MS Word, Excel, Outlook, IE, etc. I am running XP Pro, SP3 and am current with all updates for XP and Office 2007 on a Dell D420 laptop. I have run virus scans, RegCure, and Adware. In fact it happened twice while typing in this message as this is the third time I typed in this last sentence. Any help is greatly apreciated.