Hello friends, my computer is running the Windows 7 and I have some problem with that. Actually whenever I try to drag any of the files from one device to another in my computer then I get the error message as error 87: incorrect parameter. Can you tell me that what is the parameter is about and how can this be avoided? I have tried through all the possible ways for this but that was not helpful to me. Now the resolution is totally depend on you guys suggestion.