How to import contacts in windows live mail:
Shortcut: press Ctrl+Shift+C to quickly open the Windows Live Contacts window.
Import format for contacts
Once inside Windows Live Contacts, click the Show Menu button, and click Import: a submenu will expand, listing all the formats in which Windows Live Mail can import contacts. The format you choose will depend on the file or email program whose contacts you would like to import: most email clients can export their contacts as CSV files; so, in doubt, this is a good export format to choose.
Importing contacts from Microsoft Outlook or the current Windows user’s address book into Windows Live Mail is an automated process: click one of these two choices, and Windows Live Mail takes care of the rest, only notifying you in case of problem or successful import:
file formats for Importing; CSV and contact mapping
If you are trying to import contacts from a file (WAB, VCF, or CSV), you will just need to pick the file for Windows Live Mail; in the case of CSV files, you will need to make sure that the contacts’ “mapping” corresponds (it should by default). You can change the mapping, if needed, manually, to make sure each contact information column corresponds to the expected data:
After the import process has completed, look at Windows Live Contacts: you should see all contacts from your other email program, or contact file, now listed. Windows Live Mail will now have access to all these contacts when you send emails, create contact groups, etc.