Hi Alex,
are you running with updated drivers? Try checking your motherboard or laptops support page for drivers especially if you upgraded recently. If your having trouble finding them then post your spec's and we'll look for you.
If you have 'fast start-up' enabled has been known to mess with some systems so try turning it off.
Open Control Panel and choose Power Options.On the sidebar on the left, click Choose what the power buttons do.Click 'Change settings that are currently unavailable'.Under the Shutdown settings find the Turn on fast startup and uncheck it. Click save and that's it.
Try that for starters, if you get no joy post back.