What does Process Explorer say about both DUTRAY.exe and LTDU.exe?
I haven't used Process Explorer for some years now so I confess I would struggle to tell you how to use it to investigate further, so you're on your own there.
Googling both these two find some strange results. LTDU.exe just finds me this of any interest;
And DUTRAY.exe in Google finds me a whole raft of links which I won't touch with a barge pole, because my WOT, (Web of Trust), browser security plugin marks most of them as red for warning. However, the same site I linked to above has it;
Both of those are recognised as having to do with Locatemylaptop, but little else. However they do give the location for both as %SYSDIR%\LML
That path is either Windows\System or Windows\System32 in XP, so head over to those folders and look for a sub-folder named LML and see what else is there.
I still prefer the Process Explorer as it should be able to zoom in to find out more about these processes.
If you're up to it, have a look at the registry entries I noted above, and see if you can find any entries that look like they come from Locatemylaptop,