Do Not Access Suspected Emails
It is highly recommended that under no circumstances access suspected email messages, whether they are in your inbox or junk folder. Delete them immediately from the folder and then from the deleted emails folder. If you access such email messages, you are putting your system at risk.
Do Not Open Attachment
Hotmail has an internal email and attachments scanning system and it alerts you in case of detecting a virus. You should not open an attachment from a sender you do not know, or the message appears to be dodgy. For example, someone pretending to be your relative sends a message of being stuck at some airport and asking for money from you, or claiming to be your relative willing to send you an inheritance money. Do not buy into these messages and delete such emails from your inbox at once.
Delete Infected Messages Completely
Even if you do not open infected or virus containing messages, do not leave them in the folders. Some messages have capability of forwarding themselves to all addresses that are saved in your address book. So it is better to delete all infected messages from Inbox, junk folder and all deleted or trash folders. Leaving messages in your email system can be risky to your system.
Scan System If Infected
If you happen to open an email message mistakenly that hits your system with virus, scan the entire system immediately. You must have installed an anti-virus program in your system, so soon after opening the suspected message, run the scanner and scan the entire system. It will fix any problem that possibly can be caused by the virus.