Don bought an HP laptop and he's had a strange problem where after upgrading to Windows 10, the computer won't wake up for over a minute after going to sleep. Leo says the issue is a bug in the BIOS. He recommends going to HP's site to look for a BIOS update. He should also make sure that it's sleeping, not hibernating. Hibernating is a deeper sleep that saves the RAM to the hard drive and turns off. Then when it powers up again, it has to reload that RAM, which takes time. So Don should go into his power settings and disable hibernation.
Windows Key + X, open the power menu, and select "Disable Hibernation." Windows10Update.com has a tutorial on how to do it.