Microsoft issued a security warning for Windows users for a worm that has been circulating the Internet for several weeks. The worm has a bunch of different names, it is referred to as Win32/Mywife.E@mm, Nyxem, Blackdoom and others.
The worm has already infected hundred thousands PCs and is programmed to corrupt a number of common document files on the third day of every month. This worm will first start shredding files on February 3 and it also deletes files and registry keys associated with security-related applications.
It's advised to scan your PCs and update your anti-virus definitions are otherwise you might wake up on Friday and see that all of your .doc, .xls, .ppt, .rar, .zip, .pdf and other files are gone.
The virus spreads through e-mail so be carefully when opening strange e-mail attachments.