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Help! Someone is holding my computer hostage
If you see a pop-up window, webpage, or email message warning you that your computer has been locked because of possible illegal activities, you might be a victim of a criminal extortion scam called ransomware . Ransomware often masquerades as an official-looking warning from a well-known law enforcement...
18 Mar 2014
EMET: A valuable tool for PC protection
If you’re a regular reader of this blog, then you’ve probably already taken steps to help protect your PC. You have antivirus software that you trust and you keep it updated automatically. You’ve activated your firewall. You regularly install security updates. You know not to respond...
18 Oct 2013
Filing taxes? Beware of scams
It’s tax season in the United States, which means it’s time for us to remind you about tax scams—especially email messages that appear to come from the Internal Revenue Service (IRS) or another legitimate organization. These seemingly valid offers are designed to trick you into turning...
26 Feb 2013
Clean up malware resulting from the Bamital botnet
On February 6, Microsoft announced that its Digital Crimes Unit had worked with Symantec to successfully deactivate a major botnet called Bamital . Below is an overview of Bamital and how you can remove it from your computer. Botnets are networks of compromised computers, controlled remotely by criminals...
8 Feb 2013
What to do if you think you’ve fallen for a phone scam
In recent years, many of our customers have reported phony tech support phone calls from people who claim to be from Microsoft. These callers are cybercriminals who want to: Trick you into downloading malware . Take control of your computer remotely and adjust its settings to expose it to security...
11 Jan 2013
4 signs of scareware
“Scareware” is fake anti-virus software (also called “rogue security software”) that cybercriminals trick you into paying for or trick you into downloading along with malicious software. According to the latest Security Intelligence Report from Microsoft, one of the most prevalent...
17 May 2012
Microsoft helps defeat major spam botnet
Watch experts from Microsoft and other organizations explain how botnets work and how Microsoft and Pfizer helped bring down the Rustock botnet , a notorious source of spam, fraud, and cybercrime. Watch the video from CNBC World Business: Rustock Takedown Is Part of Larger War on Spam
7 Apr 2011
Click Fraud: Cybercriminals want you to ‘like’ it.
You probably already know not to open suspicious looking email attachments and not to send money to foreign princes proffering elaborate sob stories. But the tiny images that you can click on your favorite websites are safe, right? Not necessarily. Cybercriminals can create fake links even...
8 Jul 2010
SmartScreen helps protect you from malicious ads on the sites you trust
In the past we’ve told you about malvertising , fake online advertising designed to trick you into downloading malicious software onto your computer. Lately cybercriminals have been sneaking malicious ads into trusted ad networks. The Microsoft SmartScreen Filter in Internet Explorer 8 protects you...
18 May 2010
Microsoft vs. Malvertising: Tackling the threat of malicious online advertising
Malvertising might sound like a fancy kind of dry cleaning, but it’s really fake online advertising designed to trick you into downloading malicious software onto your computer. The most common kind of fake ad is for security software that you don’t need and that could harm your computer. This is often...
7 Oct 2009
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