I'm trying to resolve an issue in which Outlook 2007 will frequently start synchronizing (with what?), using over 60% cpu time (per Task Mgr) and very noticeably slow down the computer. Here are some details of the system: Intel Core2Duo cpu w/1GB RAM Windows 64-bit Vista Ultimate OS Office 2007 Typically, within a few minutes after Outlook loads, the entire computer noticeably slows down; send/receive in Outlook takes several minutes instead of the usual 10 or so seconds. When I kill the outlook.exe process using Task Manager, the cpu use drops from around 60% to the usual 1-2%. I've turned off RSS feeds and disabled internet offline files. Can anyone help me identify what Outlook is trying to synch with, and/or how I can resolve this issue? Thanks, S