Outlook 2007 problem

[Sitt]

I have 2 logons to my Vista Home Premium machine but when my wife logs onto her account Outlook is not responsive at all, it just seems to "hang" not even closing Outlook makes it close down. My Outlook works perfectly.
Machine specs is dual core cpu, Vista Home Premium - 64 bit, 4 gig RAM.
Other than Outlook problem my machine seems to work great.
I have recently reformatted and have all the latest updates.
Any help greatly appreciated.

 

[Sitt]

She has a fair amount yes, I will try deleting the older email and see if that helps, thanks.

 

[Sitt]

Deleting some old email didn't cure the problem.
The preview pane does'nt show the email either, it just appears as blank.
It's a though Outlook is trying to do something in the background, I'm going to try and delete the .pst file and reinstall it, maybe that helps