Hi Auntie Nancy,
To delete bulk emails in one go, please check the boxes beside your emails and the click delete.
If you are unable to view the check box in your e-mail account, Please follow the below given instructions:
Sign in to your Msn email account
Click on Inbox
Right click on the Header Option (like subject, from, received date) option above your email message and in the drop down click on Display Columns.
Click on Restore Default
Click on Ok. You should be able to view the check box icon beside the emails.
Hope this helps.
Thanks,
Nitesh