Hello. I am running Win7 Ultimate 32 bit on my desktop. I have 4 webcams that I want to use for home surveillance. Two are Logitech C170; two are Intopic Audio Webcams (although they sometimes show as Intopic or Vimicro or Altair) However, they all use the Windows System Driver and I seem unable to change this which means that I can only run one camera at a time on the same PC, even though the programme I am running (ContaCam) provides for four cameras. Each time I try to change the driver in Device Manager, Windows always tells me that I already have the best drivers. Can anybody help me please?