Microsoft Malware Protection Center

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  • Blog Post: FakeSysdef: We can defragment that for you wholesale! / Diary of a scamware

    Initially it was "System Defragmenter", then "Scan Disk" and now it's called "Check Disk". While the name will most certainly change again, the main goal of Trojan:Win32/FakeSysdef will surely remain the same: to trick you into buying a piece of software that does nothing...
  • Blog Post: How to defang the Fake Defragmenter

    We are tracking the trails of this fake " System Defragmenter " software since its first appearance last October 2010, and have warned our customers in our earlier post about this trojan software. In this follow-up post, we give an update including a new variant worth noting for our customers...