[LG V10 Q&A, Help & Troubleshooting] budalica:
I think I can help with that . There is thread already how to do it here on xda but its not that clear . Few things are overlooked and not explained thoroughly .

Credit for TWRP Goes to Rudi666

I got stuck little on beginning and after reboot bootloader command . So I'll explain with more details My way = Easy way .

Step 1. You have to have ADB fastboot Installed and lg Driver installed . Follow this link and install adb bootloader . https://xdaforums.com/showthread.php?t=2588979 Follow this link to install LG Driver http://lgusbdriver.com/windows/lg-usb-driver-v4-1-1-0 After you install adb there will be folder in your " My Computer / Local **** C " called adb .

Step 2. Unlock bootloader . This link will help you http://developer.lge.com/resource/mobile/RetrieveBootloader.dev?categoryId=CTULRS0702 Follow all instructions and ignore adb install instructions ( You done that already )

Step 3. Download recovery from here https://xdaforums.com/lg-v10/development/recovery-twrp-v3-0-2-0-unofficial-t3387783 and save this recovery in adb folder that was created when you installed adb and unzip it there into root folder of adb . Also Download super su and put it on sd card of your phone .

On your phone in developer options make sure your adb debugging is activated . And OEM unlock is enabled .

Step 4. Connect your phone and make sure it is set as file transfer and not battery charge or anything . If the phone asks you to allow pc to connect confirm it .

Step 5 . Open your adb folder in c and Holding SHIFT Right-click anywhere ( blank space ) inside that folder , when menu pops up click on Open Command prompt here ( or open power shell window here ) . When it opens go in it and type

adb reboot bootloader

and hit enter . Your phone will reboot leave the command window open ..... Now THIS is where some people get stuck ! Some pc's don't recognize the phone anymore and they can't flash recovery . This is what you do . Go to DEVICE MANAGER and you will see your phone connected with yellow exclamation mark . It will be either android device or unknown device or usb device , I don't remember . Right click on it and choose update driver , menu pops up go to Browse my pc for software , go to Let me pick from a list of available drivers , go to adb interface ( I think android adb will work too ) click install . When it's done your LG will be recognized by pc once more . go back to command window and type in ( Or copy Paste )

fastboot flash recovery twrp-3.0.2.0-0-h960a.img

and hit enter . When it's finished , you have to pull battery out .

Now put the battery back in and PUSH AND HOLD POWER + VOLUME DOWN buttons together . When you see LG logo release the POWER button for one second while STILL HOLDING VOLUME DOWN BUTTON and then push POWER button again . When your phone comes back on again release buttons .Your phone will have white screen asking you if you want to factory reset your phone . ( If you got confirmation on your command prompt on your pc that your recovery was installed it will NOT wipe your phone ) Push YES It will ask you if you are sure push YES again and your LG will restart in TWRP . There you find settings , change storage to sd card and go to main menu , install zip , choose SUpERSU , reboot you are done . Works on Lollipop and Nougat same . I hope I helped . Credit for TWRP Goes to Rudi666 .