Hi Guy,
Thanks for your help.
Running the agent as a process does indeed make a huge difference, now the script runs in PC without any problems.
Question: do you foresee any negative effects running the agent as a process on other scripting flavours? This important to know if my organization makes this change on all load generators.
I also tried running MDRV as IUSR_METRO, that did not make any difference, the popup still failed in PC.
Regards,
Peet