Thousands of Tufts University alumni have received letters over the past few days warning about a computer security breach that may have left their social security numbers and other personal information exposed.

According to school officials, several computers were exposed to an unknown virus or malicious software program. The computers contained old student files and they may have been downloaded.

"We don’t have any direct evidence of any unauthorized use of personal information, but we thought it would be a good thing to notify those individuals exposed," said Kimberly Thurler, a Tufts spokeswoman.

Seven thousand alumni are affected, and warning letters started going out May 24.

Tufts is offering each alumnus a free year of credit monitoring service from Experian.

Tufts, like many other colleges, once used social security numbers as student identification numbers. That practice is quickly going out of vogue across the country as identify theft fears have climbed. The files that were exposed were old records that still contained SSN’s.

Thurler said Tufts is in the process of seeking out and destroying these kinds of records.

"This is a case of old files that were still on isolated computers," Thurler said. "A small number of isolated computers were exposed."

At least one of the computers affected was located at Tufts’s Dining Services Department.

Thurler said she did not know the nature of the files that were breached.

Malicious software can seek out personal information like social security numbers and passwords. Infected computers can send data to a third party.

Back in June, we told you about Microsoft’s free code-named anti-virus, anti-malware, solution being opened to beta testers. Now that those guinea pigs have put it through the ringer, MSE is going live for all users today, meaning that there’s no excuse for not having protection installed on your computer, whether you pay for it or use Microsoft’s free tool. But why pay for what’s free?

The software uses Microsoft’s own Dynamic Signature Service which fingerprints threats constantly, without having to wait for new definitional updates. The tool is low-resource, and minimizes CPU and memory usage while the computer in use. Of course, the biggest advantage will come when the vast majority of users have installed the software, preventing the spread of malware between users. While Microsoft has no plans to push MSE out to its users, the real benefit will come when it decides to do so.

MSE has remained largely unchanged since the beta tests, and requires no registration, trials or renewals and will be available for download directly from Microsoft for XP SP2 through Windows 7, although users will have to pass a Windows Genuine Advantage test to download the product.

There are many dangerous things you can do in your life like going wand to wand with a wizard who wants to Avada Kadavra your ass. For the rest of us, our average everyday lives are typically much more mundane, so the most dangerous thing we do is bury our nose in a Harry Potter book we’ve read seven times over while walking through a crosswalk.

But, did you know that merely googling “Harry Potter” right now can be dangerous? In fact, with the release of “Harry Potter and the Half-Blood Prince” imminent, googling Harry Potter is almost a surefire way to land yourself in trouble “" and we’re not even talking about finding Daniel Radcliffe’s nudie pics from Equus.

Sketchy criminals are making fake websites that promise a link where you can “watch Harry Potter for free” “" and in the midst of a recession, who doesn’t want to save $10? They then fill the blog post with lots of comments lauding the virtues of the page. Link to a page full of screenshots from the movie, and prompt the user to install a “streamviewer.” One more click, and Accio! Your computer is now full of malware, and you’re still going to have to pay $10 to see the movie.

Presented like this, most Internet users would swear they would never fall for something this obvious, but the truth is that they do, and that’s why these techniques are still being used. This is complicated by the fact that the criminals are using the dreaded search engine optimization techniques to push their sites up Google’s result listings, and submitting their sites to Digg and Reddit, and pushing the files onto P2P networks.

The best way to protect yourself is something we’ve suggested to you before, and we’ll suggest to you again. Get‚  decent malware and virus scanners, such as the ones offered by PC Tools, and use them. We searched for any number of Harry Potter related terms writing this article and we didn’t die, so obviously the simple act isn’t inherently dangerous. Just be careful and smart.

And then there’s also the whole not being a sketchball and trying to download the movie illegally thing too. We’ll be with you at midnight tonight to see “Harry Potter and the Half-Blood Prince.”

Are those “Get a Mac” ads that always talk about how your PC is always infested with horrible viruses and spyware annoying you yet? Well, they’re certainly annoying Microsoft.

Ever since XP Service Pack 2, the company has always strongly suggested that users should install anti-virus software, displaying one of those nagging yellow bubbles in the taskbar. Before, the only tool Microsoft offered was its Windows Defender software, a free download which protects users from spyware related assaults. Now, largely in response to the never ending onslaught of new security threats, Microsoft is getting ready to release its first full blown anti-malware software, Microsoft Security Essentials.

Originally codenamed Morro, the software will offer a full range of virus and malware removal as well as real time protection. While Windows Defender offered spyware protection, this addition of protection from viruses will make this a solid, complete solution, especially considering it will be available free.

Of course, to avoid even more anti-trust issues, the software can’t be bundled directly with Windows, so exactly how Microsoft intends to “strongly suggest” that users download the software, free it may be, is yet to be seen. Also of note is that installation of the software will require users to use the Genuine Advantage program.

Leaked yesterday, the program itself is very lightweight and has very low system requirements”"all good things for a program you’ll have to keep running 24/7. ‚ As we said, this new offering will be a free downloadable addition to all Windows versions, XP through 7, when it’s released this fall. Before then though, Microsoft is opening the product (link not yet live) to 75,000 beta testers on June 23, if you want to test putting your security in Microsoft’s control.

Research from security firm McAfee shows that some celebrities are just dangerous to Google and search for around the web because of the litany of fake websites out there that try to infect your computer with viruses and malicious code as you innocently seek out wallpaper and screensavers of your favs.

Brad Pitt leads the pack on a list that includes Jessica Alba and‚ Katherine Heigl.

“Fans searching for “Brad Pitt,” “Brad Pitt downloads,” and Brad Pitt wallpaper, screen savers and pictures have an 18% chance of having their PCs infected with online threats, such as spyware, spam, phishing, adware, viruses and other malware,” McAfee said. “Cybercriminals are using A-listers’ names and images, like Beyoncƒ© and Justin Timberlake, to lure Internet users who surf the Web for the latest gossip, screen savers and ringtones to “fake” Web sites that look legitimate.”

The list includes:

1. Brad Pitt – When “Brad Pitt screensavers” was searched, more than half of the resulting Web sites were identified as containing malicious downloads with spyware, adware and potential viruses.

2. Beyoncƒ© – Inputting “Beyoncƒ© ringtones” into a search engine yields risky Web sites that promote misleading offers to gather consumers’ personal information.

3. Justin Timberlake – Interest in his high-profile relationships makes him an easy target for spammers and hackers. When searching for “Justin Timberlake downloads” one Web site advertised free music downloads that were flagged as directly leading to spam, spyware and adware.

4. Heidi Montag – “The Hills” star is a popular search term when it comes to searching for wallpaper. A host of wallpaper Web sites contained hundreds of malware-laden downloads.

5. Mariah Carey – Spammers and hackers are using Mariah Carey screen saver Web sites to link to other sites proven to contain spyware, adware and other threatening downloads.

6. Jessica Alba – Red-ranked risky sites were identified when searching for “Jessica Alba” and “Jessica Alba downloads.” The sites contained hundreds of malicious downloads, links to other bad sites, misleading offers to gather information, and a high number of spam emails when an email address was provided.

7. Lindsay Lohan – This young Hollywood starlet is as dangerous to search online as she is famous. Searching for “Lindsay Lohan downloads” resulted in several dangerous Web sites laden with hidden adware.

8. Cameron Diaz – Cybercriminals use download Web sites related to Cameron Diaz’s image to link to other harmful sites containing spyware.

9. George Clooney, Rihanna – The technology found one Web site embedded with hundreds of dangerous wallpaper and photo downloads after inputting “George Clooney downloads.” “Rihanna pictures” was also a risky search term, as McAfee identified a site that spammed its test email address.

11. Angelina Jolie – When “Angelina Jolie downloads” was searched, the software highlighted a risky site with 978 hidden malware-infected wallpaper and photo downloads, as well as links to other potentially dangerous URLs.

12. Fergie – A Fergie screen saver site was flagged as offering 111 risky downloads that could seriously compromise a PC’s privacy with unwanted spyware and adware.

13. David Beckham, Katie Holmes – The “David Beckham” search term generated a great deal of wallpaper and screen saver downloads veiled with malware. Consumers should also exercise caution when searching for “Katie Holmes” online – one download site advertised free screen savers that, if downloaded, would infect your computer with malicious programs like spyware.

15. Katherine Heigl – Hollywood’s big headliner in recent years is now susceptible to Internet lurkers too. “Katherine Heigl” was searched and a site was identified containing hundreds of malware-infected pictures.

‚ ”Cybercriminals employ numerous methods, yet one of the simplest but most effective ways is to trick consumers into infecting themselves by capitalizing on Americans’ interest in celebrity gossip,” said Jeff Green, senior vice president of McAfee’s Product Development and Avert Labs. “Tapping into current events, pop culture or commonly browsed sites is an easy way to achieve this. And because of Americans’ obsession with following celebrities’ lifestyles, they are an obvious target. We have to take precautions in casually navigating the Web since many subtle sites may be rife with malware for consumers’ computers.”

The list was compiled using McAfee SiteAdvisor, which can be downloaded for free at‚ www.mcafee.com/siteadvisor.

McAfee Avert Labs reported Tuesday the most significant malware outbreak in three years with more than 500,000 detections of a Trojan horse they’re calling “Downloader-UA.h,” which is spreading by masquerading as a media file.

“The malicious MP3 music or MPEG video files have appeared on popular file-sharing services such as Limewire and eDonkey,” Avert Labs said in a statement.

McAfee has rated “Downloader-UA.h” as a “medium” risk threat. It is the first malware to receive that risk rating since 2005. It is the most dangerous threat to mask itself as a multimedia file ever recorded.

“This is one of the most prevalent pieces of malware in the last three years,” said Craig Schmugar, threat researcher at McAfee Avert Labs. “We have never before had a threat this significant that arrives as a media file.”

The last time McAfee went to “medium” on a computer threat was W32/Sober from November 2005. Sober was a virus that proliferated massively through email.

The malicious files are all named differently in multiple languages and vary in size to make them appear like legitimate music or video files, McAfee said. Attempting to play one of the malicious files will trigger a program called “PLAY_MP3.exe” to download, launch, and force advertisements to appear on the infected computer.

Some of the sample names used by the malicious media files include “preview-t-3545425-adult.mpg” ; “preview-t-3545425-changing times earth wind .mp3″ ; “preview-t-3545425-girls aloud st trinnians.mp3″ ; “preview-t-3545425-jij bent zo jeroen van den.mp3″ ; “t-3545425-lion king portugues.mpg” and “t-3545425-los padres de ella.mpg”

If you need a another reason to get rid of Limewire and other filesharing apps, you might not get a better one.

McAfee Avert Labs announced Friday a Trojan horse attack disguised as a Microsoft update on a particular MySpace profile.

Attackers send friend requests to the victim MySpace users. Clicking on the person’s picture or name link loads a profile page with what looks like a legitimate Windows Automatic Updates pop-up box. When the user clicks the pop-up, it results in a request for a file download masked as a Microsoft update called “updateKB890830.exe” from a server that includes “winxpupdate.Microsoft” in its name.”

“The file in actuality is a true malware cocktail,” McAfee said. “If installed and run it downloads programs from multiple servers that in turn download more malware in addition to Trojans, and a remote control tool.”

Initially, McAfee thought the download files look to be from China, but its Avert Labs determined the origin of the IP address belonging to an ISP in Malaysia and further downloads directed from the Ukraine.

The malicious MySpace profile is still live, McAfee said late Friday. MySpace and Microsoft have both been notified. Users should beware of friend requests from people they don’t know and be cautious when surfing MySpace profiles.

What appeared to be a legitimate iPhone application, “iPhone firmware 1.1.3 prep,” turned out to be a piece of malicious software intended to ruin functionality on affected phones.

The programmer of this dangerous piece of code was an eleven-year-old boy.

Using the installer.app feature on the iPhone, users can access the diverse world of third-party applications. The malware in question passed itself off an update at www.jmwiki.com for applications including Erica’s Utilities, OpenSSH, Launcher and Doom. After downloading and installing the file via the iPhone’s installer.app, the malware displayed the word, “shoes” and proceeded to remove files critical to iPhone functionality.

Though by malware standards the virus was fairly tame, McAfee Avert Labs blogger Jimmy Shah noted that the piece of software highlights an important security concern with iPhone, one that depends entirely on the vigilance of well-informed users.

McAfee recommends users only acquire software only from trusted sources and install only official firmware updates.

After the child’s ISP was informed of the problem, his father was contacted and the site hosting the malicious application was taken down.