I don't know if it's a coincidence, but ever since a Windows 10 Feature update went through on October 21st, I've been having problems.

I don't like to keep shutting down and booting up, nor do I like to just leave the computer running all day, so I usually take the 'sleep' option if I'm not going to be using it for a while. This was never a problem, but now when I try to wake the computer up from its slumbers the computer seems to come back to life but the display doesn't. If I investigate, a box comes up telling me that the monitor isn't getting a signal from the computer, followed by another box saying the monitor is entering powersave mode. So I have to switch off and boot up again anyway.

Is this likely to be a Windows problem, or have I suddenly got a hardware fault? I'm afraid I'm not much of a techie.