weird .dat file on me desktop

[tops]

since the past two days theres this file that gets dumped onto my desktop 'rdxr020305.dat'. notice it after i disconnect from the net. anyone have any idea what this is and why this is happening? I've deleted it once or twice.. but its come back again.
running winme

 

[LoneWolf1]

A search of google for rdxr020305.dat leads me here. It looks like it's linked to a pop-up stopper.

hope this helps some.