00901

Virus alert - W32.Blaster.Worm
Friday 15th August
2003

The Microsoft Product Support Services Security Team is issuing this alert to inform customers about a new worm named W32.Blaster.Worm which is spreading in the wild.  Best practices, such as applying security patch MS03-026 should prevent infection from this worm.

To determine if this virus is present on your machine, see the technical details here.

You may be aware from current press coverage that there is a virus circulating on the internet which could affect certain versions of the Microsoft® WindowsT Operating System. The virus is of a type known as a "worm" and its name is W32.Blaster.Worm. This virus is also known as: W32/Lovsan.worm (McAfee), WORM_MSBLAST.A (Trendmicro), Win32.Posa.Worm (Computer Associates).

Please act now - even if you don't think that you are affected by downloading patch MS03-026, release date 16 July 2003, which prevents the worm from exploiting your system.

Please choose the appropriate link below.  The link will take you to a step-by-step guide on how to identify if you have the worm, what to do to recover your computer and how to protect it on an ongoing basis.

Windows XP users:

http://go.microsoft.com/?linkid=221401

Windows NT and Windows 2000 users:

http://go.microsoft.com/?linkid=221402

PLEASE NOTE:
Your computer is not vulnerable to the Blaster worm if you are using Microsoft Windows 95; Windows 98; Windows 98 Second Edition (SE); or Windows Millennium (Me) or if you have already downloaded and installed security update MS03-026.

Microsoft UK Limited

webmaster:
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