I have an HP 6005 Small form factor. Windows 7 Pro with 8gigs of ram. For about 3 months I had 4 monitors working on this setup, 1 using onboard VGA, 3 using the USB-VGA-165. It worked near flawlessly. I restarted my computer to change a setting in the BIOS (ended up not making the change) When my pc started up again, only the VGA adapter worked and my pc started constantly making the alert sound it makes when you attach a USB device. I unplugged all the adapters which made the noise stop. I could plug in two of the adapters without the alert sound coming back however when I plugged in the third, that one specifically, the sound would come back. During that process none of the monitors would display. I finally uninstalled the driver using the utility from your website and installed the lastest driver. When I plugged them in, one worked but the other two would not install, kept saying the device was unplugged. One gives intermitent alert sounds while the other will give continous alert sounds when plugged in. I have also tried using different usb mini cables to no avail. Any help would be much appreciated.