unwanted Hotmail emails

Kevin Mason

New Email
twice this week I have had emails sent from my hotmail account to various addresses from my contacts list ( about 40 addresses so far ) the emails look innocent enough to the recipients & contain links to sites that were in my junk mail.

I access hotmail either from my work computer that has spam filters or my Mac home computer, I did not have anti virus software on the Mac until this afternoon but after running showed no virus ( this was a free anti virus site )

I also have an iPad that would not allow me to download any anti virus,
what is the best way to stop these emails from being sent & what anti virus should I be using.