Process of elimination check hub speed is compatible with the PC and the usb port you are using.... try using hub in a different usb port....or maybe if more than one device is connected to the hub they are drawing too much power than the PC delivers. Check that drivers are being installed properly....they should install immediately they are plugged into hub. Try a restart on your PC this sometimes cures problems. Try hub in another PC to see if hub is faulty. If no luck give make and model of hub and devices you are trying to use and model of laptop plus operating system you are using and we will try something else.