The outlook file normally is hosted if it wasn't changed in:
drive:\Users\[user account name]\Documents\Outlook Files.
Inside there should be a .PST or .OST file with the account name. Just copy that file and all emails, calendars, contacts, etc should be safe.
In Microsoft Office Outlook 2007 or earlier, these files are saved in a different location in a hidden folder at drive:\Users\[user account name]\AppData\Local\Microsoft\Outlook.
That's the default config for the files. If not just search the HDD for all files including hidden ones with *.pst AND *ost