MSRundll.exe

From Symantec this virus is called W32.Vibmaru
Try to fix it by the following golden rules for virus removing:
1. Disable System Restore, if you are using XP
2. Update virus defintions
3. Run a full scan
4. Delete some registry

4. To delete the value from the registry

1. Delete these entries
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"System" = "system.exe (74295303)"
   
   
2. Restore the following registry entries to their original values, if required:
   
   HKEY_CLASSES_ROOT\scrfile\"(default)" = ""
   HKEY_CLASSES_ROOT\inifile\shell\open\command\"(default)" = "system32.exe %1"
   HKEY_CLASSES_ROOT\txtfile\shell\open\command\"(default)" = "msrundll.exe %1"
   HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\TimeZoneInformation\"ActiveTimeBias" = "420"
   HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\TimeZoneInformation\"ActiveTimeBias" = "480"