I have a colleague with Outlook 2010 on an i7 with Windows 7. When he attaches a file (from the network or local) it takes 6 to 10 seconds to complete the attachment. I created a 2nd profile on his computer, configured the Outlook to the same pop3 and imported his exported pst file. Attached to the same network share, the attachments are immediate. I tried Outlook in safe mode on the original setup but it's still slow. I have found if I drag the attachments from Windows Explorer instead of using the Outlook "attach file" the attachments are instantaneous. I told the SEP to not scan, but that did not help. Any ideas of what else I can do to troubleshoot this? Is there a way to change what Outlook uses to attach a file (for instance using explorer instead)? I tried running Process explorer and Process monitor, but there is just too much information to see what is causing this.