microsoft outlook crashes when opening attachments

pst's and mail profiles because it will decide that every time he tries to open an email with an attachment, Outlook will immediately crash before displaying even the text in the preview pane, literally single click on an email in his inbox - boom: crash. The problem is that every few weeks we have to reinstall office and purge his laptop of all. Not sure if any of that is relevant but there's some backstory for you.

pst with his entire email history stored on his laptop which is attached to his outlook profile. He has a pretty sizable outlook profile which I think is little over 10gb but he is super precious about his emails all being available to him at all times so whilst we have archiving enabled for everyone, he also has a. So he's in our Russian sales office based in Moscow (so yes, his PC is in Russian just for that extra bit of fun) and relies on a fairly janky VPN tunnel to our HQ in the US, and our office here in the UK. I've got an issue that has been cropping up for one particular user for a while now and its driving him, and me, a bit nuts.

Microsoft outlook crashes when opening attachments