I got rid of it by locating the following file and renaming it. Use
Windows Explorer, go to the "Windows" folder, then the "System32"
folder, and look for a file called MSrdk.xml. Rename it to MSrdk.bak.
This seems to have eliminated the problem for us.
there is a fix for this listed at
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=TROJ_POPMON.A
On Windows 2000
Restart your computer.
Press the F8 key, when you see the Starting Windows bar at the bottom
of the screen.
Choose the Safe Mode option from the Windows 2000 Advanced Options
Menu then press Enter.
Removing Autostart Entries from the Registry
Removing autostart entries from the registry prevents the malware from
executing during startup.
To remove the malware autostart entries:
Open Registry Editor. To do this, click Start>Run, type Regedit, then
press Enter.
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>Software>Microsoft>
Windows>CurrentVersion>Run
In the right panel, locate and delete the entries:
Iefeatures = "%System%\IEFEATURES.exe"
MSVersion = %System%\IEFEATURESVERSION.exe"
%System%\ MSrdk.xml
stcloader = "%System%\stcloader.exe"
ClrSchLoader = "C:\Program Files\ClearSearch\Loader.exe"
Slmss = "C:\Program Files\Common Files\slmss\slmss.exe"
"mwsvm.exe"
Note: %System% is the Windows system folder, which is usually
C:\Windows\System on Windows 95, 98 and ME, C:\WINNT\System32 on
Windows NT and 2000, and C:\Windows\System32 on Windows XP.
Close Registry Editor.
NOTE: If you were not able to terminate the malware process from
memory as described in the previous procedure, restart your system.
Uninstalling Downloaded Components
This procedure removes the components installed by the malware.
Open Control Panel.
Double-click Add/Remove Programs.
In the list of installed programs select "Lycos SideSearch" and click
remove.
Open a command prompt windows. Click Start >Run, type CMD and then
press the Enter key..
At the command prompt, type the following:
regsvr32 /u mwsvm.ocx.
Still in the command prompt, type the following:
regsvr32 /u ieasst.dll
Close the command prompt window.