%SysDir%\msx.dll is Trojan/Backdoor ICQCHK. Kill the file %SysDir%\msx.dll and remove %SysDir%\msx.dll from Windows startup. Related files in the %SysDir% folder (usually c:\ Windows\System32): kaboom.dll iewatch.exe A0003016.exe VideoCodec3_05b.exe sysmon.exe msx.dll gtrack.dll ietool1.exe ietool2.exe ietool3.exe