Outlook 98 unexpected shutdowns

[jons1]

I have a Toshiba Satellite 4080 laptop using Windows 98 which is running Oulook 98, which in turn connects to an Exchange server for mail. Over the past couple of days the machine hangs when typing emails. Half way through typing the email a message is displayed saying that the email will be saved in drafts then outlook shuts down / hangs and then reboots the machine. You can restart Outlook and salvage the email from drafts to carry on.

If anyone has any ideas on why or how to stop this from happening it would be appreciated.

Thanks

Jon