Security experts have identified two new spams designed to infect recipients’ computers with malware.

WARNING NO. 1: Trend Micro just reported that there’s an email purporting to provide users with a “critical update” fro Microsoft Outlook and Outlook Express.

Within the body of the email are what appear to be authentic links to authentic Microsoft sites. But a click on the link downloads a key logger virus that records keystrokes on banking and social networking sites.

If you receive an email purportedly from Microsoft DON’T CLICK ON THE LINK! GO DIRECTLY TO THE MICROSOFT SITE FOR UPDATES!

WARNING NO. 2: There’s also a fake Twitter invite going around. If you receive an email inviting you to join Twitter, check to see if there’s a URL link within the body of the email. If there is, the invitation is legitimate.

The bogus invitation has an attachment with a .zip file. DON”T OPEN THE ATTACHMENT! It’s a malicious Ackantta worm that will suck away all your email addresses and copy itself over and over.

Twitter has become Iran’s virtual battleground and the primary news source since Iranian officials have silenced journalists. Before the Iranian election, there were an estimated 5 to 10 million users.

“As Twitter continues to gain popularity among social networking users, people are regularly receiving invitations and email updates from fellow users," Symantec researcher Sammy Chu said in a blog last week. "We expect that spammers will continue to use Twitter and other popular social networks as bait in their attacks."

Earlier this month Twitter users were directed to a fake YouTube site built to infect PCs.