Laptop running vista, it has two USB ports on it. Recently both USB ports stopped working and had no power to them either, I couldn't see them in computer or in disk management, I tried updating all drivers and also tried removing all USB from registry and rebooting system but still no change to the problem, i tried a Microsoft fix it tool which said hardware wasn't being recognised and although it claimed to have fixed it ,it hasn't ,and after reboot I tried the tool again and got the exact same result as the first time. Then I remembered that the very last thing I plugged into the USB ports before this problem was my cctv dvr ( stupid I know but I wanted to see if I could access it this way) I realised that since I plugged in the dvr the USB ports hadn't worked ,and so I plugged in the dvr again into one of the ports and just like before nothing happened, but then I plugged in a variety of other devices into the other USB port whilst leaving the dvr plugged in at the same time and all the other devices that I tried worked straight away and they show in both my computer and in disk management and they have drive e allocated to them, how can I get both USB ports to work properly without having to plug my dvr into one port just to get the other single port working ? I've also tried startup repair and disabling the selective feature in the registry, all drivers are up to date and when I try to scan for hardware changes it doesn't help, the only thing that helps at all is plugging the dvr back into one port which then wastes that port and also is not ideal as I can't carry my dvr around with me lol, and help to resolve this would be much appreciated, thanks