Pc does not detects mp4 player

Hi,

I have a number of USB memory and worked perfect, but recently connect my mp4 player and if it detects the device manager, and removing hardware drivers also gets safely, but the problem did not start playing automatically nor the device's icon appears on my computer, I thought that was my player but connect my other memories and the same step and then the probe into other PC's and if they work I read something called daemon tools and how to disable that program but I do not have to remove what that option, so not because I can not see the contents of my storage devices or rather data source. I have not changed anything in pc

Hi,

There must be some viruses?

Leave doubts. Make a scan online and leave us their reports in this same message.

thank you very much for the help I scanned and clean and found the real evil in the front usb connected cables where disconnected , I realized this when I opened my PC to connect both new and volvi to unite , this had cause problem to me.