Windows problem: lockx.exe

When my daughter’s computer starts up, I get (I’m troubleshooting here) the “do you want to run this?” pop-up window and it says it wants to run lockx.exe which is in WINDOWS/system32. I’ve searched, and there is no lockx.exe in system32. Does anyone know what this is and how to get rid of it?

Looks like you got yourself a piece of malware there buddy:

Get yourself some anti-virus for that computer.

Damn you runner pat!!!

It appears to be a worm. Kill it hard.