SOLUTION -- How to remove it from your system:
 

Note: Steps marked optional are not absolutely necessary and are completely safe to skip.

1.Click Start, then Shut Down, then "Restart Computer in MS-DOS
    mode", then click Yes. It's important to do this so you can make the necessary changes.

2.At the DOS prompt type this exactly and press enter at the end of each line:

     CD \WINDOWS\SYSTEM

     If your Windows folder is not called WINDOWS then substitute the name of your
    Windows folder instead, for example:

     CD \WIN95\SYSTEM

3.Delete SKA.EXE and SKA.DLL by typing

     DEL SKA.EXE
     DEL SKA.DLL

     If you get "File not found" you're either not infected or in the wrong directory. Make sure
    you're in your Windows System directory; check to see if you followed step 2 exactly.

4.Copy WSOCK32.SKA to WSOCK32.DLL by typing

     COPY WSOCK32.SKA WSOCK32.DLL

     Answer "Yes" if it asks if you want to overwrite WSOCK32.DLL.
        Explanation: WSOCK32.SKA is a backup of the original WSOCK32.DLL made by the
                                virus. You are replacing the modified DLL with the original.

5.Optional Delete WSOCK32.SKA by typing

     DEL WSOCK32.SKA

     You can leave WSOCK32.SKA on your system. It is a copy of your original
    WSOCK32.DLL
     Do not delete WSOCK32.SKA if you are unable to replace WSOCK32.DLL with
     WSOCK32.SKA.

6.Return to Windows by typing

     EXIT

7.Optional Click Start, then Run, then type regedit in the text box, then click OK. Click
        HKEY_LOCAL_MACHINE, then Software, then Microsoft, then Windows, then
        CurrentVersion.  Under RunOnce check for SKA.EXE and select it if it is there. Press
        delete and then click Yes. Close Regedit.  Don't change anything else without making a
        backup of the registry first. If you don't find SKA.EXE in the registry, it doesn't
        mean you're not infected. SKA.EXE is only added to the registry if HAPPY99.EXE is
        unable to modify WSOCK32.DLL when you run it.

8.Optional Choose Start, Programs, Accessories, Notepad, choose File, then Open then type
     C:\WINDOWS\SYSTEM\LISTE.SKA in the File Name box. Warn the people on
        the list, then delete LISTE.SKA.