It sounds to me like your virus removal software didn't quite quarantine or remove the "happy99.exe" virus.
Click here to download the Happy99.Worm removal tool from the Symantec site. According to Symantec, here is also the manual way to remove the virus if it is still there:
All file renaming and deletions can be performed via Windows Explorer.
1. Delete WINDOWS\SYSTEM\SKA.EXE.
2. Delete WINDOWS\SYSTEM\SKA.DLL.
3. In the WINDOWS\SYSTEM\ directory, rename WSOCK32.DLL to WSOCK32.BAK.
4. In the WINDOWS\SYSTEM\ directory, rename WSOCK32.SKA to WSOCK32.DLL.
5. Delete the downloaded file, usually named HAPPY99.EXE.
Windows prevents you from doing steps 3 and 4 above if the machine is still connected to the Internet.
The file "windows\system\wsock32.dll" is used whenever the machine is connected to the Internet (through dial-up or LAN connection).
If you are using dial-up connection (i.e. America Online), you need to do the following:
1. Terminate internet connection.
2. Delete WINDOWS\SYSTEM\SKA.EXE.
3. Delete WINDOWS\SYSTEM\SKA.DLL.
4. In the WINDOWS\SYSTEM\ directory, rename WSOCK32.DLL to WSOCK32.BAK.
5. In the WINDOWS\SYSTEM\ directory, rename WSOCK32.SKA to WSOCK32.DLL.
6. Delete the downloaded file, usually named HAPPY99.EXE.
If you are connected to Internet through LAN (i.e. in the office or cable modem), you need to do the following:
1. On the Windows taskbar, click START > Shut Down > Restart in DOS mode.
2. At the DOS promt type CD \windows\system.
3. Type RENAME WSOCK32.DLL WSOCK32.BAK.
4. Type RENAME WSOCK32.SKA WSOCK32.DLL.
5. Type DEL SKA.EXE.
6. Type DEL SKA.DLL.
To return to windows from DOS without exiting out of DOS, type
Alt+
Esc.
Erik.