Since the URL given previously is causing problems, here is the text it contains:
Name: VBS/LoveLet-A
Type: Visual Basic Script worm
Detection: Detected by Sophos Anti-Virus version 3.34 or later. An update (IDE file) is available for earlier versions from the Latest virus identities section.
This virus has been very widely reported in the wild. Further IDEs will follow with a fuller analysis.
Comments: This is a virus which tries to spread itself in several ways. Most commonly, it sends itself as an attachment to an email.
Infected emails have the subject line:
ILOVEYOU
The message text is:
kindly check the attached LOVELETTER coming from me.
The attachment is called "LOVE-LETTER-FOR-YOU.TXT.vbs", which has a "double extension". Mailers which suppress well-known extensions such as .vbs may present this file as "LOVE-LETTER-FOR-YOU.TXT", which appears more innocent. Do not be misled by a trick like this.
Because the virus arrives in a VBS file, it requires the Windows Scripting Host (WSH) in order to work. If you disable WSH, the viral attachment will be rendered harmless.
The virus also drops an HTM file which can spread the virus, and a mIRC script which tries to distribute it. It also tries to download a file called WIN-BUGSFIX.exe from the internet, and injects two copies of its VBS script into the system directory where they are executed each time the computer reboots.
The email component of the virus requires Microsoft Outlook to work. If you are using Outlook it will try to send itself to each entry in your Windows Address Book.
Note that following the Sophos Guidelines for Safe Hex will render you almost immune to this attack. If you do not read unusual or unlikely emails and if you have disabled the WSH, then you are unlikely to become infected.