A friend of mine has been sent an email virus a trojan horse via facebook and also she has recived an email saying "salutations" from a friend that she recently had an argument with she has not opened it. Could she have sent her a virus thanks x
When you receive mails with attached documents from any unknown source (people, company, etc.), never download those attachments.
Or if in case you're doubtful about the sender and think it might be someone you know, make sure to scan the attachment before downloading.
As a prevention measure(or in case your email service doesn't provide an anti-virus scanning service for the mail attachments, make sure to scan the downloaded file with an updated anti-virus software as soon as you download it BEFORE you open it.