My laptop has been having this problem ever since I first tried Windows 7 since 2009. What happens is, sometimes, when I reboot it, it just hangs infinitely as described in my title. I can't ever really reboot it, so normally I just put it on standby and avoid installing critical stuff. When I do reboot it and get lucky that it doesn't hang forever, I have to make a full image using a backup utility so that I can restore it. I tried many fresh installs already but this always happens. What could be the problem?
Several reasons for a black screen.