Installed a new ASUS Sabertooth Z87 motherboard, an Intel i5 4670 Haswell CPU and 16 GB or RAM. Flashed to latest UEFI, chipset drivers, etc. Tried to install Rapid Start and get an error message that "this computer does not meet the minimum requirements for installing the software". Windows 8.1 is installed and running on a Samsung 840 SSD. Sleep mode is finally working but when I wake up the computer it takes about 30 seconds or so before a program will open. I suspect not having fast start is a reason. This computer is up to date and I can't figure out why Fast Start won't install since the error message doesn't tell me what the problem is other than not meeting minimum requirements.\n\nI just noticed in the UEFI under Rapid Start (which is enabled) there is a greyed out line that says "no valid partition". No idea what that is or if it relates to the problem.