deleted ubuntu partition, restoring uefi

Hello all.

I am running Windows 8.1 on my Acer Aspire V5-571PG. Well, Windows 8.1 may be a stretch.

Months ago, I decided to switch to a dual-boot configuration of Windows 8.1 and ubuntu. To accomplish this, I switched my bootloader from UEFI to GRUB. I decided ubuntu was not for me, and rather than looking up uninstallation techniques, I simply removed the ubuntu partition and used a third-party tool to reallocate the empty space to my Windows partition (I somehow managed to create my ubuntu volume to the left of the Windows volume so that was a complete pain). Now I am stuck with a GRUB startup scheme, displayed in pictures below:


Above is the first screen. I figured out that to navigate to the next menu, I have to type "exit." After I first type "exit" and hit enter, the same screen comes up. I repeat the process and the next screen is shown:


When I select "Windows Boot Manager," I am able to successfully boot Windows 8.1.

I also checked my disk partition settings and I infer that I have also mistakenly deleted my recovery volume:



Any help and direction in repairing my disaster of a bootloader would be much appreciated!!!

Go into the BIOS and under Boot Options delete the Ubuntu as a boot source. Then move the Windows Boot Loader up in the boot order to boot first. This has worked for me.

Thank you for the helpful tips!!

I should have mentioned in my original post that I want to phase out GRUB entirely and revert completely to UEFI.