I have a user on XP sp3 (up to date) who hangs Outlook 2007 every time she attaches a PDF to an email. The hang occurs after she selects the file from her folder, at the moment she clicks the Insert button. She "forgot" to tell me right away when it first started happening, but the timing seems to coincide with my updating Reader 9.4.2 to X. Outlook happily accepts all other file types I've tried without error or complaint. In fact, it will send the PDFs as well, if I simply remove the file extension before attaching them. If I don't, I can wait 5-10 minutes for the attachment to finally appear on the email, or I can kill Outlook in task manager and generate another event 5000. The files are just text, mostly around 125-150kb in size.
Funny thing is that she is running the same version of Adobe as all the other users, none of whom have this problem. We have a very vanilla app mix here; Office 2003 or 2007, Dynamics, Symantec, and mostly Adobe Readers plus a couple people on Pro. The only thing that I can think of that might be different in her case is that she recently had some disk issues, and I put her on a new disk just after the 1st of the year. I suppose it is possible that something in her system image was corrupt, but then, none of these errors occurred until after the first of this month. Unfortunately, I cannot restore her system to a date far enough back to be useful.
Here's a list of what I've tried so far, testing again after each step:
Ran Office diagnostics; nothing found.
Archived most of her Sent Items and ran a Compact; current PST ~ 550 meg.
Deleted all temp files in Local Settings.
Deleted the Secure Temp folder contents.
Ran the disk cleanup tool and defrag.
Removed and reinstalled Acrobat Reader X.
Disabled Adobe's 'Secure Mode.'
Removed AV altogether.
Scanned the PC with a few of my favorite scanners; no malicious software found.
Pounded my head on my desk. Several times. No joy.
So later today I thought I'd check out her file associations and stare at Outlook addins. I am ready to give up and reinstall all on a freshly formatted disk, but I'm hoping that you folks will have ideas I haven't tried yet.