I do not recommend that you use any Registry Cleaners, Optimizers, Driver Updaters, Tune -Up utilities, etc.
They may do more harm to your operating system than any good that they claim to be able to do.
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Device driver:
https://www.computerhope.com/jargon/d/driver.htm
You normally only replace/reinstall drivers if you are having a problem with the existing ones or you require newer features that a newly released driver for a particular device would give you.
A lot of released drivers have never been updated since the year that they were released, but the devices they are for still work correctly.
You should obtain your Driver Software from your Computer or Hardware Manufacturer, not through Windows Update (except for Microsoft Hardware Updates), as Microsoft normally does nor have those latest Drivers available as Microsoft relies on the 3rd Party
Hardware Manufacturer to supply them.
Go to your Computer or Hardware Manufacture's website > Driver and Software Support Section > look up your Computer or Hardware Model number > then your Operating System > locate the correct Drivers > download and install them.
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See if this assists you with your Repair options.
You can use the power button to restart your computer three times. This will start the Windows Recovery Environment.
"How To Access Advanced Startup Options in Windows 8 or 8.1"
http://pcsupport.about.com/od/windows-8/a/open-advanced-startup-options-windows-8.htm
"How to Boot to Advanced Startup Options in Windows 8 and 8.1"
http://www.eightforums.com/tutorials/4935-startup-options-menu-boot-windows-8-a.html
There is detailed information here too.
http://www.eightforums.com/tutorials/2843-automatic-repair-run-windows-8-a.html
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And please read this method:
"How to Boot to "System Recovery Options" in Windows 8 and 8.1"
http://www.eightforums.com/tutorials/2269-system-recovery-options-boot-windows-8-a.html
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If you need Media for Refresh and/or to reinstall, read this information.
You can contact the Laptop/Computer Manufacturer and order Recovery Media from them for a small cost.
You can download and create your own Windows 8.1 Installation Media to reinstall the Operating System with..
"Create installation media for Windows 8.1"
http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media
A similar Tutorial which may also assist you
"Create Installation Media for Windows 8.1"
http://winsupersite.com/windows-8/create-installation-media-windows-81
In the first screen of this very simple wizard, you need to choose the following:
Language. English – en-us if you're in the United States.
Edition. Windows 8.1 (Core), Windows 8.1 N, Windows 8.1 Pro, Windows 8.1 Pro N, or Windows 8.1 Single Language.
Architecture. 64-bit (x64 ) or 32-bit (x86).
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"How to Create a Bootable USB or DVD with a Windows 8 or 8.1 ISO"
http://www.eightforums.com/tutorials/2227-create-bootable-usb-dvd-windows-8-iso.html
Warning
This will not work to install Windows 8 or 8.1 for UEFI. For that, see this tutorial below instead.
UEFI Bootable USB Flash Drive - Create in Windows
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With Windows 8/8.1 The Product Key on preinstalled Operating Systems (HP, Acer, etc) is embedded in the BIOS in the Motherboard, so that the lost and/or worn C.O.A. Sticker problem is no more.
When you reinstall it will pick up the Product Key and activate the system automatically.
If it does not, follow these steps:
"How to Activate Windows 8 and 8.1 by Phone"
http://www.eightforums.com/tutorials/24636-activate-windows-8-phone.html
"Get help with activation errors"
http://windows.microsoft.com/en-us/windows-8/activation-errors
"How to activate a Microsoft product by using Microsoft Product Activation Center"
http://support.microsoft.com/kb/950929/en-us
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This information may interest you if you do wish to keep a record of it:
"Windows 10 Embedded Product Key Tool"
https://neosmart.net/blog/2014/windows-10-embedded-product-key-tool/
"We’re proud to introduce the immediate release of our newest utility for Windows users: the NeoSmart Technologies Embedded Product Key Tool. Designed for users of Windows 7, Windows 8, and Windows 10, our embedded product key tool will retrieve and display the Windows setup product key embedded in the BIOS or EFI, allowing you to store it for safe-keeping or use it to reinstall Windows with an official Windows setup image."
Cheers.